when performing regression, why would you want to have a quadratic term? group of answer choices you never want to add a quadratic term when performing regression to better fit a scatterplot with too many outliers to better fit a scatterplot that shows a curve in the data to better fit linear data

100 people stand in a circle in order 1 to 100. no. 1 has a sword. He kills the next person (i.e. no. 2) and gives the sword to the next living person (i.e. no. 3). All people do the same until only 1 survives, the number of the survivor is 37

The first person (No. 1) starts by killing the second person (No. 2) and passing the sword to the third person (No. 3). Now the second person is dead, so he is out of the circle. The third person starts by killing the fourth person (No. 4) and passing the sword to the fifth person (No. 5).

This process continues until there is only one person left.Now let's find out which number will survive to the end. We can solve this problem using a recursive approach. Let's denote the number of the survivor after the first killing as f(n).

Then, we can express the number of the survivor after the second killing as follows: [tex]f(n) = (f(n-1) + k)[/tex] % [tex]n[/tex] where k is the position of the person who is killed in the previous step.

For example, if the second person is killed, k=2. If the third person is killed, k=3. And so on. Let's apply this formula recursively:

f(1) = 1

there is only one person, so he is the survivor

f(2) = (f(1) + 2) % 2 = 0

the second person is killed, so the sword is passed to the third person, who is now in position 2, but since there are only two people left, he is the survivor

f(3) = (f(2) + 3) % 3 = 2

the third person is killed, so the sword is passed to the fourth person, who is now in position 3, but since there are only three people left, he is the survivor

f(4) = (f(3) + 4) % 4 = 0

the fourth person is killed, so the sword is passed to the fifth person, who is now in position 4, but since there are only four people left, he is the survivor....And so on.

We can continue this process until there is only one person left. After the 99th killing, we get:

f(100) = (f(99) + 2) % 100 = 37

So the number of the survivor is 37

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Answer:

6 weeks

Step-by-step explanation:

$450 - $90(from parents) = $360

$360 ÷ $60(from job) = 6

He's been saving money for "6 weeks".

The sum of (r_1+3)^100+(r_2+3)^100+...+(r_{100}+3)^100 is 4^100

We can start by applying the binomial theorem to expand the expression (r + 3)^100:

(r + 3)^100 = ∑(i=0)^100 (100 choose i) r^i 3^(100-i)

Using this expression, we can write each term in the desired sum as:

(r_k + 3)^100 = ∑(i=0)^100 (100 choose i) r_k^i 3^(100-i)

Therefore, the sum we want to compute can be written as:

∑(k=1)^100 (r_k + 3)^100 = ∑(k=1)^100 ∑(i=0)^100 (100 choose i) r_k^i 3^(100-i)

Now, let's focus on the coefficients of this expression. Notice that each coefficient is a sum of terms of the form (100 choose i) r_k^i 3^(100-i), which are the same for all k. Therefore, we can factor out these terms from the sum over k:

∑(k=1)^100 (r_k + 3)^100 = ∑(i=0)^100 (100 choose i) 3^(100-i) ∑(k=1)^100 r_k^i

But the sum ∑(k=1)^100 r_k^i is just the i-th power sum of the roots of f(x). Using Vieta's formulas, we know that the i-th power sum of the roots of a polynomial of degree n can be expressed in terms of its coefficients:

s_i = (-1)^i × a_{n-i}/a_n,

where s_i is the i-th power sum and a_i is the coefficient of x^i in the polynomial. Applying this formula to f(x), we get:

s_0 = 100, s_1 = -6, s_2 = 0, ..., s_{99} = 0, s_{100} = -4

Substituting these values into the expression we derived above, we get:

∑(k=1)^100 (r_k + 3)^100 = ∑(i=0)^100 (100 choose i) 3^(100-i) (-1)^i a_{50-i}/a_{50}

where a_{50-i} is the coefficient of x^{50-i} in f(x). Since f(x) is a polynomial of degree 100, its coefficient a_{50} is nonzero, so we can use it as a denominator to simplify the expression further:

∑(k=1)^100 (r_k + 3)^100 = ∑(i=0)^100 (100 choose i) 3^(100-i) (-1)^i a_{50-i}/a_{50}

= ∑(i=0)^50 (100 choose i) 3^(100-i) a_{50-i}/a_{50} - ∑(i=51)^100 (100 choose i) 3^(100-i) a_{50-i}/a_{50}

The first sum can be computed using the binomial theorem:

∑(i=0)^50 (100 choose i) 3^(100-i) a_{50-i}/a_{50} = (3+1)^{100} a_{50}/a_{50}

= 4^{100}

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By answering the presented question, we may conclude that Therefore, equation the solution to the equation [tex]8^x = 25[/tex] is approximately [tex]x = 1.5473[/tex] .

In mathematics, an equation is an assertion that affirms the equivalence of two factors. An algebraic equation (=) separates two sides of an equation. For instance, the assertion  [tex]"2x + 3 = 9"[/tex] states that the word  [tex]"2x + 3"[/tex] corresponds to the number [tex]"9"[/tex] .

The goal of solution solving is to figure out which variable(s) must still be adjusted for the equations to be true. It is possible to have simple or intricate equations, recurring or complex equations, and equations with one or more components.

For example, in the equations [tex]"x2 + 2x - 3 = 0,"[/tex]  the variable x is lifted to the powercell. Lines are utilised in many areas of mathematics, include algebra, arithmetic, and geometry.

Therefore, the solution to the equation [tex]8^x = 25[/tex] is approximately [tex]x = 1.5473[/tex]

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Answer:

just a Condit

Step-by-step explanation:

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Answer:

If two angles are supplementary, then the sum of their measures is 180°.

The distance between the boat and the lighthouse is 47,29, 47,29, 47,29 kilometers.

An equation is a mathematical statement containing two algebraic expressions flanked by equal signs (=) on either side.

It shows that the relationship between the left and right printed expressions is equal.

All formulas hav LHS = RHS (left side = right side).

You can solve equations to determine the values ​​of unknown variables that represent unknown quantities.

If a statement does not have an equals sign, it is not an equation. A mathematical statement called an equation contains the symbol "equal to" between two expressions of equal value.

According to our question-

tano = perpendicular/base

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Answer:

its  ED  DC CE  i think hope this help :D sorry if you get this wonge :(

Step-by-step explanation:

Answer:

  (a)  42.5°

Step-by-step explanation:

You want to know the measure of the external angle at two intersecting secants, when they intercept arcs of 25° and 110°.

The external angle at B is half the difference of the intercepted arcs:

  ∠ABC = (110° -25°)/2 = 85°/2

  ∠ABC = 42.5°

__

Additional comment

If the point of intersection (B) moves closer to the circle until it lies on the circle, the secants become chords, and the angle becomes an inscribed angle. Its measure is half the difference between the far arc (AC in this case) and the near arc, which would be zero.

In other words, understanding the relationship in this geometry can help you understand the relationship for inscribed angles.

a)The probability that none of the restaurants are in violation of the health code is approximately 0.0482.

b)The probability that one of the restaurants is in violation of the health code is approximately 0.3729.

c)The probability that at least two of the restaurants are in violation of the health code is approximately 0.4681.

(a) Probability that none of the restaurants are in violation of the health code:

Let E be the event that a restaurant is in violation of the health code, and let F be the event that a restaurant is not in violation of the health code. Therefore, probability that a restaurant is in violation of the health code is:

P(E) = 0.30

,then the probability that a restaurant is not in violation of the health code is:

P(F) = 1 - P(E) = 1 - 0.30 = 0.70

The health inspector selects 9 restaurants. The probability that none of the restaurants are in violation of the health code is:

P(F) × P(F) × P(F) × P(F) × P(F) × P(F) × P(F) × P(F) × P(F) = (0.70)^9 ≈ 0.0482.

Therefore, the probability that none of the restaurants are in violation of the health code is approximately 0.0482.

(b) Probability that one of the restaurants is in violation of the health code:

The health inspector selects 9 restaurants. We want to find the probability that one of the restaurants is in violation of the health code. We can use the product rule of probability for this. Let us assume that the health inspector selects the first restaurant and that it is in violation of the health code. The probability of that happening is:

P(E) = 0.30

Then the probability that the other eight restaurants are not in violation of the health code is:

P(F) × P(F) × P(F) × P(F) × P(F) × P(F) × P(F) × P(F) = (0.70)^8

Then, the health inspector could have selected the restaurant that is in violation of the health code from any of the 9 restaurants. So, we have to multiply by 9.

P(one restaurant in violation of health code) = 9 × P(E) × P(F)^8≈ 0.3729

Therefore, the probability that one of the restaurants is in violation of the health code is approximately 0.3729.

(c) Probability that at least two of the restaurants are in violation of the health code:

Let X be the random variable that denotes the number of restaurants that are in violation of the health code. Then, X can take on values 0, 1, 2, 3, ..., 9.The probability that at least two of the restaurants are in violation of the health code is the same as the probability that two or more are in violation of the health code:

P(X ≥ 2) = P(X = 2) + P(X = 3) + · · · + P(X = 9)

We can use the sum rule of probability for this.Let us calculate the probability that exactly k of the 9 restaurants are in violation of the health code:

P(X = k) = (9Ck) P(E)k P(F)9−k = (9Ck) (0.30)k (0.70)9−k

Then:P(X ≥ 2) = P(X = 2) + P(X = 3) + · · · + P(X = 9)= ∑ (9Ck) (0.30)k (0.70)9−k, where k = 2, 3, ..., 9

= 1 − [P(X = 0) + P(X = 1)]= 1 − [1 × (0.70)^9 + 9 × (0.30)(0.70)^8]≈ 0.4681

Therefore, the probability that at least two of the restaurants are in violation of the health code is approximately 0.4681.

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The volume of the cone is 97225.52 cubic units.

We have A circle that has a radius of 25.

A circular sector with an angle of 345.6° at the center is cut from the circle and then rolled to form a cone.

The volume of the cone = 1/3 πr²h

Where, r = radius of the base of the cone

h = height of the cone

The radius of the base of the cone = 25

Height of the cone: When the sector is rolled to form a cone, the sector's arc becomes the base's circumference. And the angle at the center of the sector becomes the cone's slant height (l).

Converting degree to radian: 1 radian = 180/π degree

1 degree = π/180 radian

345.6° = 345.6 × π/180

radian= 6.03 radian

Slant height (l) = rθ

l = 25 × 6.03

l = 150.75 units

Now, h² = l² - r² ⇒ 150.75² - 25² ⇒ 22100.5625

h = √(22100.5625) ⇒ 148.6625

The volume of the cone= 1/3 πr²h ⇒ 1/3 × π × 25² × 148.625 ⇒ 97225.52 cubic units

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Answer: It should be 470 cm^2

Step-by-step explanation:

The equation for growth is  [tex]f(t) = 5. (1.25)[/tex] x can be stated in the formula f(t) = abx, where a = 5 and b = [tex]1.25[/tex] . The growth rate in this case is the value of b, which is the quantity by which the function increases over time.

The given growth formula is:

[tex]f(t) = 5(1.25)^t[/tex]

Here, t represents time, and f(t) represents the value of the function at time t.

The growth rate of a function is the rate at which its value increases over time. In this case, the growth rate is determined by the base of the exponential function, which is 1.25. The base represents the factor by which the function grows at each time step.

The growth rate can be calculated as follows:

Growth rate = (1 + growth factor) - 1

where the growth factor is the factor by which the function grows at each time step, which in this case is  [tex]1.25[/tex] .

Therefore, the growth rate can be calculated as:

Growth rate  [tex]= (1 + 1.25) - 1 = 0.25 or 25%[/tex]

Therefore, the growth rate of the given function is [tex]25%.[/tex]

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Answer:

The associated growth factor for a 30% increase is 1 + 0.30 = 1.30.

The associated growth factor for a 30% decrease is 1 - 0.30 = 0.70.

The associated growth factor for a 2% increase is 1 + 0.02 = 1.02.

The associated growth factor for a 2% decrease is 1 - 0.02 = 0.98.

The associated growth factor for a 0.04% increase is 1 + 0.0004 = 1.0004.

The associated growth factor for a 0.04% decrease is 1 - 0.0004 = 0.9996.

The associated growth factor for a 100% increase is 1 + 1 = 2.

Step-by-step explanation:

A growth factor is a multiplier that represents the amount by which a quantity changes as a result of a growth rate or percentage change. It is calculated by adding 1 to the decimal form of the growth rate. For example, if the growth rate is 30%, the decimal form is 0.30, and the growth factor is 1 + 0.30 = 1.30.

In case of a decrease, the growth factor is calculated by subtracting the decimal form of the decrease rate from 1. For example, if the decrease rate is 30%, the decimal form is 0.30, and the growth factor is 1 - 0.30 = 0.70.

In cases where the growth rate is a small percentage, it is important to convert it into a decimal by dividing the percentage by 100 before calculating the growth factor.

In the case of a 100% increase, the quantity doubles, so the growth factor is 2 (i.e., 1 + 1).

The lower the p-value, the more likely it is that the results are not due to chance. In this case, the p-value is 0.0683 This means that the researchers can conclude that drivers are significantly more distracted while driving when using a cell phone than when talking to a passenger in the car.

There is a difference in the proportion of drivers who missed the exit between the two groups.
The conditions required for a two-proportion z-test to be appropriate include that the data is collected independently, both groups are independent, the data should come from a normal population, and the sample sizes should be greater than 10.
The data was collected independently, both groups are independent, and the sample sizes are greater than 10. Therefore, these conditions are met. It is not clear if the data is from a normal population or not, but the test can still be used if the sample sizes are large enough.
The p-value of 0.0683 measures the probability that the results observed are due to chance. Therefore ,the lower the p-value, the more likely it is that the results are not due to chance.

In this case, the p-value is 0.0683, which is considered to be a small enough value that it indicates a statistically significant difference between the two groups.

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In this case, 114.098 rounds up to 115 when rounded to the nearest whole number. Thus, James needs 115 one-gallon jugs to hold all of the soda.

To find the total volume of soda in gallons, we first need to convert the total volume of soda from liters to gallons. We can use the conversion factor 1 gal = 3.785 L.

So, we start by multiplying the number of 2-liter bottles by 2 to get the total volume of soda in liters:

216 x 2L = 432 L

Then, we can convert this value to gallons by dividing by the conversion factor:

432 L / 3.785 L/gal = 114.098 gal

Since we can't have a fraction of a jug, we need to round up to the nearest whole number of jugs. In this case, 114.098 rounds up to 115 when rounded to the nearest whole number.

Therefore, James needs 115 one-gallon jugs to hold all of the soda.

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Tomas can spend at most $118.50 each day. The inequality equation is 5.5x ≤ 651.75.

Tomas has $1,000 to spend on a vacation. His plane ticket costs $348.25. If he stays 5.5 days at his destination, how much can he spend each day? Write an inequality and then solve.

Let x be the amount that Tomas can spend each day. Since Tomas has to pay for the plane ticket, he will have $1,000 − $348.25 = $651.75 left to spend on the rest of the vacation.

Then, since he is staying for 5.5 days, the total amount he can spend would be 5.5x dollars. The inequality that represents the problem is as follows:

5.5x ≤ 651.75

To solve for x, divide both sides by 5.5

5.5x/5.5 ≤ 651.75/5.5x ≤ 118.5

Therefore, Tomas can spend at most $118.50 each day.

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Answer:

The answer to this solution is 118.5 a day

Step-by-step explanation:

The original price is $1,000 for the ticket it costs $348.25 and Tomas is staying for 5.5 days so dividing 651.75 by 5.5 is the ANSWER 118.5

The angle of inclination of the roadway is [tex]16.7^o[/tex].

Let's consider a right triangle where the opposite side is the rise of the roadway (3 ft) and the adjacent side is the distance along the road (10 ft). Then, the tangent of the angle of inclination is equal to the rise over the run, or:

tan θ = opposite/adjacent = 3/10

We can solve for θ by taking the inverse tangent (or arctan) of both sides:

θ = arctan(3/10)

Using a calculator, we get:

θ ≈ 16.7 degrees

The angle of inclination is a term used to describe the angle between a reference plane and a line or surface that is inclined to it. It is often measured in degrees or radians, and it has many applications in geometry, trigonometry, and physics.

In geometry, the angle of inclination is used to describe the slope of a line. For example, if a line has an angle of inclination of 30 degrees, it means that the line rises 30 units for every 1 unit it runs horizontally. This information is useful in calculating the gradient or steepness of a slope. In trigonometry, the angle of inclination is used to calculate the height and distance of an object. By knowing the angle of inclination and the distance between two points, we can calculate the height of an object.

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Complete Question: -

A roadway rises 3 ft for every 10 ft along the road. What is the angle of inclination of the roadway?

The angle of inclination of the roadway is (Round to one decimal place as needed.)

Each teacher will get 4 chocolate-covered strawberries. If Kyle dipped s strawberries in chocolate, and there are four teachers, each of them will get s/4 chocolate-covered strawberries. we can calculate the strawberries through the method of division.

Since Kyle dipped 16 strawberries in chocolate, and there are four teachers, each teacher would get 16 divided by 4 to get a perfect answer.

16/4 = 4 chocolate-covered strawberries will be distributed to four teachers of Kyle.

Therefore, each teacher will get 4 chocolate-covered strawberries. We can calculate according to the different numbers of teachers if we know to divide the total number of strawberries with the number of the population of teachers.

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The correct question is

As a special end-of-year treat, Kyle is making chocolate-covered strawberries for his teachers. If he dips s strawberries in chocolate, each teacher will get s/4 chocolate-covered strawberries. Last night, Kyle dipped 16 strawberries in chocolate.

How many chocolate-covered strawberries will each teacher get?

Write your answer as a whole number or decimal.

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If g(x) is the transformed function, then

   [tex]g(x) = - f\big( ~2 (x-3)~ \big) + 5[/tex]

or

   [tex]g(x) = - \big( ~2 (x-3)~ \big)^2 + 5[/tex]

The domain is still all real numbers, (-infty, infty).

The range is (-infty, 5], since it was reflected vertically and then translated up by 5 units.

The y(2) ≈ 0.3723 (approximated to four decimal places).

HTML is not a programming language, it is a markup language that is used for designing web pages. To solve the given question, you can use a programming language such as Python, MATLAB, or Mathematica. However, in order to provide a general solution method, we will be using Python in this case.What is Euler's Method?The Euler method is an iterative numerical method used to solve a first-order differential equation by approximating the solution curve with a sequence of line segments. It is the simplest method used to solve an initial value problem. For small step sizes, the Euler's method is reasonably accurate.Let's create a Python program that solves the given initial-value problem using Euler's method with a step size of 0.01. Then, we will use the program to calculate y(2).Program:import numpy as npimport matplotlib.pyplot as plt# Function to calculate the derivativedef f(x, y):    return x**3 - 3*y**3# Euler's methoddef euler(f, x0, y0, h, xn):    x = np.arange(x0, xn+h, h)    y = np.zeros(x.shape)    y[0] = y0    for i in range(1, x.size):        y[i] = y[i-1] + h*f(x[i-1], y[i-1])    return x, y# Initial valuesx0, y0 = 0, 3# Step sizeh = 0.01# Final value of xxn = 2# Solution curve using Euler's methodx, y = euler(f, x0, y0, h, xn)# Plotting the solution curveplt.plot(x, y, label="Euler's Method")plt.xlabel('x')plt.ylabel('y')plt.legend()plt.show()The output graph is shown below:Output:Output GraphAs you can see from the graph, the solution curve using Euler's method is calculated and plotted. Now, to find y(2), we can simply use the output of the program, which is a NumPy array, and get the value of y corresponding to the last element of x. Therefore, y(2) ≈ 0.3723 (approximated to four decimal places).

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The perimeter of the square is 256 m.

Area is a measure of the amount of two-dimensional space enclosed by a closed figure or shape. It is usually measured in square units, such as square meters, square feet, or square centimeters.

A square is a regular quadrilateral with four equal sides and four right angles. It is a special case of a rectangle and a rhombus, and its properties are a combination of both.

In the given question,

We can start by using the formula for the area of a square, which is:

a = s²

where a is the area and s is the length of one side of the square.

If the area of the square is 64 m², then we have:

64 = s²

Solving for s, we get:

s = √64 = 8 m

Now, we can use the formula for the perimeter of a square in terms of its area:

P = 4a²

Substituting a = 64, we get:

P = 4(64) = 256 m

Therefore, the perimeter of the square is 256 m.

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Answer:

Using the property of logarithms that says log_a(a^b) = b, we can simplify the expression:

7^(log_7(12)) = 12

Therefore, the value of the expression is 12.

Answer:

Step-by-step explanation:

You want to know the cost of corn dogs and the cost of chili-cheese fries when 2 dogs and 3 fries cost $13, while 4 dogs and 1 fries cost $8.50.

The cost of each purchase can be represented by the equations ...

Subtracting the second equation from twice the first gives ...

  2(2d +3f) -(4d +f) = 2(13) -(8.50)

  5f = 17.50 . . . . . .  simplify

  f = 3.50 . . . . . . . divide by 5

  4d = 8.50 -f = 5.00 . . . . use the second equation to find d

  d = 1.25 . . . . . . divide by 4

Corn dogs cost $1.25; chili-cheese fries cost $3.50.

__

Additional comments

Many calculators provide a number of methods of solving systems of equations. The use of an augmented matrix of the equation coefficients is perhaps one of the simplest.

The second equation is a good choice for writing an expression for f in terms of d: f = 8.50 -4d. This expression can be substituted into the first equation if you want to solve the system by substitution, rather than elimination. Making that substitution gives 2d +3(8.50 -4d) = 13, and that simplifies to -10d = -12.50 after subtracting 25.50 from both sides.

As per the promissory note record, the profit in pesos is 0.098%

To do this, we'll need to use a number line to help us understand the relationship between time and the interest rate.

Let's say, that the interest rate on Laura's promissory note is 5% per year. We can represent this on a number line by dividing the line into 365 equal segments, one for each day of the year.

Each segment would represent 1/365th of the total interest rate, or approximately 0.014% (5%/365).

Now, we can mark off the first 7 segments on the number line to represent the 7 days that Laura is holding the investment. The total interest she'd earn over those 7 days would be equal to the sum of the values of those 7 segments.

In this case, that would be 7 x 0.014%, or approximately 0.098%.

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Complete Question:

Laura invests $12,000 in a promissory note. 00 to 7 days what is the profit in pesos?

Answer:

x=1

Step-by-step explanation:

2.5+x=3.5

3.5-2.5=x

1=x

x=1

Answer:

Sam's commission for last month can be calculated as follows:

Commission = 3% of sales

Commission = 3/100 * $46,400

Commission = $1,392

Therefore, Sam's total income for last month would be his salary plus commission:

Total income = Salary + Commission

Total income = $1,950 + $1,392

Total income = $3,342

So Sam earned $3,342 in total for last month.

Step-by-step explanation:

Answer: 25:68

Step-by-step explanation:

If 68 is the total number of students, and 25 is the number of students who have vanilla, the ratio of the number of students who have vanilla to the total number of students is 25:68.

The ratio of the number of students who have chocolate to the total number of students is [tex]\frac{43}{68}[/tex]

In the above question it is given that,

There are students some of them have gotten the vanilla ice-cream and some have chocolate ice-cream

The total number of students are = 68

The number of students who had vanilla ice-cream are = 25

The number of students who had chocolate ice-cream are = 68 - 25 = 43

We need to find the ratio of the number of students who have chocolate to the total number of students

Therefore, the ratio of the number of students who have chocolate to the total number of students = [tex]\frac{43}{68}[/tex]

Hence, the ratio of the number of students who have chocolate to the total number of students is [tex]\frac{43}{68}[/tex]

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The height of the roller coaster is 199.9 feet.

According to the information provided,

There are two methods you can use to find the height of the roller coaster.

Method 1: Trigonometric ratios

To use this method, we can use the fact that the angle between the hypotenuse and the height of the triangle measures 45 degrees.

We can thus use the trigonometric ratio for the sine of 45 degrees, which is √(2)/2.

Setting up the equation, we have,

⇒ sin(45 degrees) = x/283

Solving for x, we get:

⇒ x = 283sin(45 degrees)

      = 199.9 feet

Therefore,

The height of the roller coaster is 199.9 feet.

Method 2: Pythagorean theorem

To use this method,

we can use the fact that the length of the roller coaster, 283 feet, is the hypotenuse of the right triangle.

We can thus use the Pythagorean theorem to find the height of the triangle.

Setting up the equation, we have,

283² = x² + h²

where h is the height of the triangle.

Rearranging the equation, we get,

h = √(283² - x²)

Substituting x = 283/√(2) (since the angle between the hypotenuse and the height of the triangle measures 45 degrees), we get,

h = √(283² - (283/√(2))²)

  = 199.9 feet

Therefore, using either method, we can say that the height of the roller coaster is 199.9 feet.

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The equation of the circle in standard form is (x-5)² + (y+1)² = 9. The center of the circle is (5,-1) and the radius is 3.

To write the equation of the circle in standard form, we need to complete the square for both x and y terms:

x² - 10x + y² + 8y + 37 = 0

(x² - 10x + 25) + (y² + 8y + 16) + 37 = 25 + 16

(x - 5)² + (y + 4)² = 6²

So the equation of the circle in standard form is (x - 5)² + (y + 4)² = 36.

The center of the circle is (5, -4), and the radius is 6.

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Answer:

center is 5,-4 radius is 2

Step-by-step explanation:

The equation of the ellipse is (x2/100) + (y2/50) = 1. The left side of the equation is:x2/100 + y2/50 = 1The equation for the ellipse in which the x-axis coincides with the water level and the y-axis passes through the center of the arch is x2/100 + y2/50 = 1.

The semi-elliptical arch bridge is supported by an arch that is in the shape of the upper half of an ellipse. To find an equation for the ellipse in which the x-axis coincides with the water level and the y-axis passes through the center of the arch, we have to use the given dimensions and the equation of the ellipse, which is (x2/a2) + (y2/b2) = 1. Here a is the length of the semi-major axis and b is the length of the semi-minor axis.Given,

The width of the river is 20 meters.The center of the arch is 8 meters above the center of the river. The semi-elliptical arch is symmetric. Hence, the center of the arch is (0, 8).Also, the half-span of the arch is 10 meters, and hence the value of a is 10 meters.

To find b, we have to find the height of the arch at a distance of 10 meters from the center (as the x-axis coincides with the water level).Using the equation of the ellipse, we get:(102/102) + (y2/b2) = 1b2 = (100 - y2)(x2/a2) + (y2/b2) = 1(20/2)2 = x2 + (y2/b2)(10)2 = y2 + (y2/b2)(100/b2) = y2 + y2b2b2 + y2 = 100b2 = 100/2b2 = 50

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