Answer:
To reduce bias when estimating mean commuting time
Step-by-step explanation:
Given that the selection of adults is based on the three strata found in the region; urban, suburban, and rural areas where the population and proportion of adults commuting to work is progressively decreasing, using a uniform number or sample size will not increase sample error as there are more commuters in the urban areas than in the suburban or rural areas, likewise, there are more commuters in the suburban area than in the rural areas, and as such the proportion of those sampled in the urban areas should be more than those surveyed in the suburban while those surveyed in the suburban areas should be more than those surveyed in the rural areas to reduce bias when estimating the mean as there will be more general representation.
(7x10^5)x(3x10^2) in standard form
Answer:
2.1 x 10^8
Step-by-step explanation:
The expression (7x10⁵)x(3x10²) in the standard form will be 2.1 x 10⁸.
What is an expression?The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.
Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.
Given that the expression is (7x10⁵)x(3x10²). The standard form of the expressions can be written as,
E = (7x10⁵)x(3x10²)
E = ( 7 x 3 ) x ( 10⁵⁺²)
E = 21 x 10⁷
E = 2.1 x 10⁸
Hence, the standard form is 2.1 x 10⁸.
To know more about an expression follow
https://brainly.com/question/29431018
#SPJ2
factor the following form
X^3+ 27=0
I don’t know what to do with this what’s the answer
Given :-
Area = 10.6 cm²Height = 4cm[tex] \\ \\ [/tex]
To find :-
Base of triangle[tex] \\ \\ [/tex]
We know. :-
[tex] \boxed{ \rm Area_{(triangle)}= \frac{1}{2} \times base \: \times heigt}[/tex]
[tex] \\ [/tex]
By using this formula we can find base of triangle.
[tex] \\ \\ [/tex]
So:-
[tex] \dashrightarrow\sf Area_{(triangle)}= \frac{1}{2} \times base \: \times heigt \\ [/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf 10.6= \frac{1}{2} \times base \: \times 4\\ [/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf 10.6= \frac{1}{ \cancel2} \times base \: \times \cancel4\\ [/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf 10.6= \frac{1}{1} \times base \: \times 2\\ [/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf 10.6 = base \: \times 2\\ [/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf base \: \times 2 = 10.6 \\ [/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\sf base= \frac{10.6}{2} \\ [/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\bf base= 5.3 \: cm \\ [/tex]
Answer these i have all the answers already just testing Tyyyyy <3
BRAINLIEST GIVEN
Answer:
1. B
2. A
3. C
4. A
I hope this helps!
In a chess match, a win counts as 1 point, a draw counts as ½ point, and a loss counts as 0 points. After 15 games, the winner was 4 points ahead of the loser. How many points did the loser have?
Answer:
The loser had 5.5 points
The he winner had 9.5 points
Step-by-step explanation:
9.5 - 5.5 = 4
5.5 + 9.5 = 15
(1.7x10^4) x (8.5x10^-2)
Step-by-step explanation:
(1.7x10^4) x (8.5x10^-2)
17000 × 0.085
= 1445
Which statements are true when solving x^2=81
Answer:
D.) the solution is 9
Step-by-step explanation:
9x9 = 81
A grocer mixes peanuts that cost $1.41 per pound and walnuts that cost $2.61 per pound to make 100 pounds of a mixture that costs $1.89 per pound. How much of each kind of nut is in the mixture?
w = 60 lb (amt. of walnuts needed)
100-w = 40 lb (amt. of peanuts needed)
If these four countries trade only within this group, what is the difference between the highest balance of trade and the lowest balance of trade? a. $6,221,000,000 b. $5,003,000,000 c. $3,772,000,000 d. $2,123,000,000.
Balance of trade is the difference that is between the value of a country's exports and the value of its imports.
What is a balance of trade?
Your information is incomplete. Therefore, an overview will be given. The balance of trade or net exports, is the difference between the monetary value of a nation's exports and imports over a period.
The balance of Trade formula = Country's Exports – Country's Imports.
For example, suppose the USA imported $1.8 trillion but exported $1.2 trillion to other countries, then the USA had a trade balance of -$600 billion.
Learn more about balance of trade on:
https://brainly.com/question/24473707
Answer:
The correct answer is A. $6,221,000,000
Step-by-step explanation:
just took the test
Which compound inequality is represented by the graph?
Answer:
The third option, x < -2 or x ≥ 4
Step-by-step explanation:
First, we need to interpret the graph.
There is an open circle at -2 and a closed circle at 4, which means that x does not include 2 and includes 4.
The left arrow points to numbers lower than -2, and the right arrow points to numbers greater than 4, so X is less than -2 and greater than 4.
find the length of the circumference of the circles under the following condition, take pie =3.14
pls show me explanation question no 1,
radius =20 cm
Answer:
The answer is 125.66 cmStep-by-step explanation:
Circumference of a circle = 2πr
where
r is the radius
From the question
r = 20 cm
We have
C = 2(20)π
= 40π
= 125.663706143592...
We have the final answer as
125.66 cmHope this helps you
Somebody please help me on multiple step equations with parenthesis.
Answer:
k = 8
Step-by-step explanation:
8(10 - k) = 2k
First, distribute within the parenthesis,
80 - 8k = 2k
Add 8k to both sides of the equation
80 = 10k
Divide both sides by 10 to get your answer
8 = k
I hope this helps :)
What is 7/10 equivalent to write the answer in fractions
Need help asap giving 15 points
Answer:
197 in^2
Step-by-step explanation:
See attached image
A slope of -5 that passes through (2,15)
Answer:
y=-5x+25
That is the answe in slope intercept form
on the number line, point b is between points a and c. the distance between points a and b is 1/3 of ac.
Step-by-step explanation:
find distance of AC first
ac= √(y2-y1)²+(x2-x1)²
since there is no y we will consider it zero
so Ac= √(16-(-8))²
ac=24
ab is 1/3 of ac so it means
24*1/3=8
so ab is 8 units
The location of point B on the number line is 0.
Given that,
on the number line, point b is between points a and c. the distance between points a and b is 1/3 of ac.
A number line is defined as the number marked on the line calibrated into an equal number of units. For example -1, 0, 1, and so on.
Here,
AB = 1/3 AC
AB = 1/3 (16 - (-8))
AB = 1/3 (16 + 8)
AB = 1/3 * 24
AB = 24 / 3
AB = 8
B - A = 8
B - (-8) = 8
B + 8 = 8
B = 8 - 8
B = 0
Thus, location of the point B on the number line is at 0.
Learn more about number line here:
brainly.com/question/17683084
#SPJ2
I don't get my question for my homework. Here is the questions, "You have 46 gold coins, 115 diamonds, and 184 rubies. You need to put them in treasure chests, and each chest must contain the same number of each individual item. What is the greatest number of treasure chests you can fill? How many gold coins in each chest? How many diamonds in each chest? How many rubies in each chest? " This is the type of question. There is also one more problem I'm stuck on. "You and some friends took a metal detector to the beach every day for a week to search for coins. You managed to find 246 nickels, 312 dimes, and 204 quarters. When you divided them up, you realized that each person got the same exact amount of each coin with no coins remaining. How many are in your group? How many nickels did each person receive? How many dimes did each person receive? How many quarters did each person receive?" Please help me out! Thanks
Answer:
Question 1
The greatest number of treasure chest you can fill = 23
Step-by-step explanation:
Gold coins = 46
Diamonds = 115
Rubies = 184
To determine the greatest number of treasure chests you can fill, find the highest common factors of 46, 115 and 184
46 = 1, 2, 23, 46.
125 = 1, 5, 23, 115
184 = 1,2,4,8,23,46,92,184
The highest common factors of 46, 115 and 184 is 23
The greatest number of treasure chest you can fill = 23
Number of gold coins in each chest = 46/23
= 2
Number of diamonds in each chest = 115 / 23
= 5
Number of rubies in each chest = 184 /23
= 8
Question 2
Nickels = 246
Dimes = 312
Quarters = 204
Find the highest common factor of 246, 312, 204
246 = 1, 2, 3, 6, 41, 82, 123, 246
312 = 1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 104, 156, 312.
204 = 1, 2, 3, 4, 6, 12, 17, 34, 51, 68, 102, 204
The highest common factor of 246, 312, 204 is 6
How many are in your group?
6 members
There are 6 members in your group that each person got the same exact amount of each coin with no coins remaining.
Number of nickels each person receive = 246 / 6
= 41
Number of dimes each person receive = 312 / 6
= 52
Number of quarters each person receive = 204 / 6
= 34
the perimeter of a square piece of cardboard is 56 inches. how long is each side of the piece of cardboard ? PLEASE ANSWER ASAP
Answer:
14 inches
Step-by-step explanation:
To calculate the area of a square, multiply the base by itself, which can be expressed as side × side. If a square has a base of length 8 inches its area will be 8 × 8= 64 square inches. Area of a square is given by: A = a2. where a = length of side. Perimeter of a square = 4a.
14 is the answer
Madeleine had 4 pizzas at her house. After giving some of the pizza to her neighbor, Madeleine had 2 12 pizzas left. How many pizzas did Madeleine give to her neighbor?
a
Eight people want to enter an elevator
with a maximum weight capacity of
500 kilograms. Their weights in kilograms
are 81, 97, 69, 75, 74, 96, 86, and 53.
What is their total weight? How many
people should wait?
Step-by-step explanation:
total weight = 81 + 97+69+75+74+96+86+53 = 613kg
2 people will have to wait
Problem 1. 1
Jada paints a circular table that is 30 inches across.
Is the circumference of the circle or the area of the circle
more useful for finding how much paint she needs?
Circumference
Area
How much paint does she need?
square inches
Submit
??? What is it
Answer:
Minor note: A table is circular.In this case, the area is more useful to find out how much the paint covers.
This is, because the circumference is the perimeter of the table whilst the area is the whole region of the table.
So to find out the area of this table, we must use the formula for the area of a regular circle.
A = π[tex]r^{2}[/tex]
Where 'π' represents pi(22/7 or 3.14), and 'r' represents the radius which is being squared.
But, if we see the information that we have, we can see that it gives the diameter and not the radius.
So in order to find out our radius, we must perform 1/2 of the diameter(1/2 x diameter) to find the radi.
30(diameter) x 1/2
= 15 is the radius.
Now we substitute this value into our equation, since it's the only information we need.
A = π[tex]r^{2}[/tex]
A = 3.14(15^2)
A = 3.14(225)
A = 706.5 square inches of paint is needed to cover the table.
PLEASE HELP!!!,,,,,,
Answer:
The solution to the system is: (3, 2)
Step-by-step explanation:
We are given:
y = -2x + 8
and
4x - 2y = 8
We are given the "y" in this equation.
So when solving these questions, it is better to use the substitution method when solving
So we substitute "y = -2x + 8" with "y" in the equation "4x - 2y = 8
So, the equation would look like this: 4x - 2(-2x + 8) = 8
And we are solving for "x" in the equation
4x − 2(−2x + 8) = 8 (Distribute)
−2(−2x+8) (Simplify)
4x + 4x − 16 = 8 (Combine Like Terms)
(4x + 4x) − 16 = 8 (Simplify)
8x − 16 = 8 (Add 16 to both sides)
8x - 16 + 16 = 8 + 16 (Simplify)
8x = 24 (Divide both sides by 8)
8x/8 = 24 (Simplify)
x = 3
Now that we know the "x", in this equation, we can solve for the "y"
We just substitute the "x" into the equation "y = -2x + 8"
The equation looks like this: y = -2(3) + 8
y = -2(3) + 8
Multiply −2 and 3 to get −6
y = -6 + 8
Add −6 and 8 to get 2
y = 2
(x, y) = (3, 2)
The solution to the system is: (3, 2)
Pls help me with some math
You and two friends were playing baseball in your backyard. Your friend hit the ball over the fence and into the neighbor's window. You and your two friends decided to evenly split the cost of repairing the window that will cost $148.89 for the glass, plus $52.50 for labor. What is your share of the total cost to replace the window?
Answer:
100.695
Step-by-step explanation:
Find the vectors joining following two points (2.5) and (6,4)
vect u for (2 ; 5) and (6 ; 4) :
vect u (6 - 2 ; 4 - 5)
=> vect u ( 4 ; - 1 )
Worth all my points plus brainliest help plzzz 1-5
Answer:
1. H, - 6/5
2. B, 8
3. B, 15
4. B, integer
5. F
Step-by-step explanation:
Hope this helps and pls do mark me brainliest if you can:)
Is it Possible for the expression 1+|a| to have a result that is less than 0?
Answer:
No
Step-by-step explanation:
Since a is in absolute value symbols, you would be adding a positive number to 1, and therefore cannot have a number lower than 0.
For example, say a = -3. We would get 1 + |-3| = 4.
Answer:
No
Step-by-step explanation:
Because the vertical lines mean the absolute value of a.
- a negative value of a like -2 in vertical lines has absolute value 2.
If a = 0 then absolute value = 0.
So 1+|a| will always be positive.
what percentage of students were surveyed between the ages of 10-13?
Answer:
60%
Step-by-step explanation:
The total is 90 students, and 54/90 is 0.6. 0.6 is equal to 60%!
In a pasture are horses and chickens if there are a total of 28 animals and 80 legs how many chickens and horses
Answer:
16 horses and 12 chickens
Number of chickens and Number of horses are 16 and 12 respectively.
Number based problem:Given that:
Total number of heads = 28
Total number of legs = 80
Find:
Number of chickens and horses
Computation:
Assume;
Number of chickens = a
Number of horses = b
So,
a + b = 28 ........ Eq1
2a + 4b = 80 ...... Eq2
From Eq1 and Eq2
b = 12
a = 16
Find out more information about 'Number of horses'.
https://brainly.com/question/24559885?referrer=searchResults
2x-5(x - 4) = - 7+ 5x – 21
Find X
Answer:
x=6
Step-by-step explanation:
2x-5x+20=-7+5x-21
-3x-5x=-7-21-20
-8x=-48
x=6
Answer:
x=6
Step-by-step explanation:
2x-5x+20=5× -28
-3x+20=5x-28
-8x=-48
x=6
check:
2x-5(2)=-30-28
12-10=2
2=2