can someone help me with this I already answered half of all of them but I need to make sure It's right?
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Answer:
yes 0.265 is correct it is your answer
Related Questions
help me please i dont get it
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Answer:
Q11 part a
Q12 part b
Step-by-step explanation:
Plot the point (3, - 2 .
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The mass of the apples harvested from a particular orchard follows a nearly normal distribution with a mean of 94 grams and a standard deviation of 27 grams. What size sample is needed to get a standard error of 3
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The sample size needed to get a standard error of 3 is 81
How to determine the sample size?The given parameters are:
Mean = 94Standard deviation = 27Standard error = 3The standard error is calculated using:
[tex]SE = \frac{\sigma}{\sqrt n}[/tex]
So, we have:
[tex]3= \frac{27}{\sqrt n}[/tex]
Divide both sides by 3
[tex]1= \frac{9}{\sqrt n}[/tex]
Square both sides
1 = 81/n
Multiply both sides by n
n = 81
Hence, the sample size needed to get a standard error of 3 is 81
Read more about standard errors at:
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The temperature of a cup of coffee varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T minus A, where T is the temperature of the coffee, A is the room temperature, and k is a positive constant. If the coffee cools from 100°C to 90°C in 1 minute at a room temperature of 25°C, find the temperature, to the nearest degree Celsius of the coffee after 4 minutes.
74
67
60
42
Answers
Answer:
(b) 67
Step-by-step explanation:
A solution to the differential equation describing the temperature according to Newton's Law of Cooling could be written as ...
T = (final temp) + (initial difference)×(decay factor)^t
where the decay factor is the fraction of change during 1 unit of time period t.
__
Here, the initial difference of 100-25 = 75 degrees decays to 90-25 = 65 degrees in 1 minute. So, the units of t are minutes, the decay factor is 65/75, the initial difference is 75 degrees, and the final temperature is 25 degrees. That lets us write the equation as ...
T = 25 +75(65/75)^t
Then for t=4, the temperature is ...
T = 25 +75(13/15)^4 ≈ 67.3 . . . . degrees
After 4 minutes the temperature of the coffee is about 67 degrees.
You have been asked to develop a composite measure of the quality of life on your campus.
1. Outline the social indicators you would use to develop such a measure. Be specific. Explain why you selected these indicators?
2. Now suppose data on your social indicators have been collected over a ten-year period. What might you be able to do with these data?
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The social indicators that can be used to know the quality of life in campus are the number of hours spent in school, extra curricular activities, etc.
What are social indicators?It should be noted that social indicators are used to monitor the social system.
The social indicators that can be used to know the quality of life in campus are the number of hours spent in school, extra curricular activities, etc. They're important to assess ones social life.
In conclusion, after necessary data has been collected m, a research can be made to know how the quality of life is affected by the data.
Learn more about indicators on:
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Solve: x2 - 2x + 1 = 4
Please help me
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Let's solve your equation step-by-step.
x2−2x+1=4
Step 1: Subtract 4 from both sides.
x2−2x+1−4=4−4
x2−2x−3=0
Step 2: Factor left side of equation.
(x+1)(x−3)=0
Step 3: Set factors equal to 0.
x+1=0 or x−3=0
x=−1 or x=3
Answer:
x=−1 or x=3
Pls help with this it’s easy
If u click there will be pic
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Answer:
15, the second one.
Step-by-step explanation:
We can use this proportion:
[tex]\frac{centimeters}{meters}[/tex]
So, in this case:
[tex]\frac{5 centimeters}{20 meters}[/tex]=[tex]\frac{x centimeters}{60 meters}[/tex]
We can cross multiply, resulting in:
[tex]20x = 300 centimeters[/tex]
Divide both sides by 20, resulting in:
[tex]x = 15 centimeters[/tex]
f(x) = 1?-1.9(x) = x - 2. Find
(a) ( + g)(3)
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Answer: f(x)=1-1.9x=x-2
Step-by-step explanation:
Big brain time.
Please answer this correctly without making mistakes
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Answer:
The answer is 10 months
Step-by-step explanation:
An airplane on autopilot took 5 hours to travel 3540 kilometers. What is the unit rate for kilometers per hour?
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Answer:
708 km.
Step-by-step explanation:
3540/5=708
Answer:
708 km/h
Step-by-step explanation:
3540 / 5 = 708
Joyce purchased 84.92 in groceries and gives the clerk $100 bill how much change should the clerk give back to her
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Answer:
$15.08
Step-by-step explanation:
When subtract 84.92 from 100 you get 12.08 which is how much he clerk should give back
Answer:
15.08
Step-by-step explanation:
A t-shirt that was originally priced at $14 is marked down to $10.
About what is the percent decrease?
A. 40%
B. 28.6%
C. 71.4%
D. 140%
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8.)
To buy your Halloween costume, you borrowed $15.00 from your mom. Then you
borrowed $3.50 from your Dad to buy face paint, and another $4.00 from your
sister for accessories. How much money do you owe altogether?
Answers
Answer:
22.50$
give brainiest
Answer:
You Owe $22.50
Step-by-step explanation: All yo do is add up all of the $ That they owe to each person and That is your answer.
a chess club has 20 girls and 15 boys. seven of the girls and 7 of the boys in the chess club are also in the math club.
what percent of the students in the chess club are also in math club?
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Answer:
40% why? because 20+15=35 that is the total but they are saying 7 boys and 7 girls are in math and chees so is 14 14/35 is 40%
plss help mee
Show your work plss not just the answer
If two people share one soda, how much of the soda should each person get?
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Answer:
1/2 of the soda:) sure yan
Answer:
sorry i dont know
Step-by-step explanation:
White 4x+y=8 in slope intercept form
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Answer:
y=-4x+8
Step-by-step explanation:
the area of a rectangle is 30 to the square root of 3750 square inches, and the length is 3 to the square root of 250 inches. what is the width of the rectangle?
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We are given that:
Area of rectangle is 30√3570Length of the rectangle is 3√250Area of rectangle is given by:
[tex] \implies\quad{\pmb{ \sf{Area = length\times width}} }[/tex]
Hence, putting the values in the formula:
[tex] \implies\quad \sf{ A = l\times w}[/tex]
[tex] \implies\quad \sf{ 30\sqrt{3750}=3\sqrt{250}\times w}[/tex]
[tex] \implies\quad \sf{3\sqrt{250}\times w = 30\sqrt{3750} }[/tex]
[tex] \implies\quad \sf{ w =\dfrac{30\sqrt{3750}}{3\sqrt{250}}}[/tex]
[tex] \implies\quad \sf{ w =10\dfrac{\sqrt{3750}}{\sqrt{250}}}[/tex]
[tex] \implies\quad \sf{ w = 10\times\sqrt{\dfrac{3750}{250}}}[/tex]
[tex] \implies\quad \underline{\underline{\pmb{\sf{ w =10\sqrt{15}}}}}[/tex]
Solve. Use the discount equation
S = R − rR, where S is the sale price, R is the regular price, and r is the discount rate.
An exercise bike is on sale for $320, having been marked down 20% off the regular price. Find the regular price.
Answers
Answer:
[tex]\$ 400[/tex].
Step-by-step explanation:
In this question, [tex]S[/tex] (sales price) and [tex]r[/tex] (discount rate) are both given. The unknown is the regular price, [tex]R[/tex].
Rearrange the discount equation to solve for [tex]R[/tex] in terms of [tex]S[/tex] and [tex]r[/tex].
[tex]S = R - r\, R[/tex].
[tex]S = (1 - r)\, R[/tex].
Divide both sides by [tex](1 - r)[/tex]:
[tex]\displaystyle \frac{S}{1 - r} = \frac{(1 - r)\, R}{1 - r}[/tex].
[tex]\begin{aligned}R &= \frac{S}{1 - r}\end{aligned}[/tex].
It is given that [tex]S = 320[/tex]. A mark-down of [tex]20\%[/tex] is equivalent to a discount rate of [tex]r = 20 / 100 = 0.20[/tex]. Substitute in [tex]S[/tex] and [tex]r[/tex] to find the value of [tex]R[/tex]:
[tex]\begin{aligned}R &= \frac{S}{1 - r} \\ &= \frac{320}{1 - 0.2} \\ &= \frac{320}{0.8} \\ &= 400\end{aligned}[/tex].
Thus, the regular price would be [tex]\$ 400[/tex].
8. A tree on a 30° slope grows straight up. What are the measures of the
greatest and smallest angles the tree makes with the hill? Explain.
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the slope makes a 30-degree w/ the horizon, then we can draw it out by making a right triangle out of it
we'll get a 30-60-90 triangle
the tree will make 2 angles w/ the slope, one on each side.
so draw the tree on the slope, then you'll get a 60 and 120 degree
it'd be easier if you visualize this problem
hope it helps! I know I sound confusing
The measure of the smallest angle of a tree with a hill is 60°.
The measure of the greatest angle of a tree with a hill is 120°.
Given:
A tree on a 30° slope grows straight up.
To find:
The measures of the
greatest and smallest angles the tree makes with the hill.
Solution:
In figure drawn:
[tex]\angle PQR = 30^o[/tex]
AB= Straight three
Construction:
Draw a parallel line CA to QR through point A.
Now,
[tex]\angle PQR = \angle PAC = 30^o\\\\\angle PAC +\angle PAB = 90^o \text{(Complimentary angles)}\\\\\angle PAB = 90^o -\angle PAC\\\\angle PAB=90^o-30^o=60^o[/tex]
The measure of the smallest angle of a tree with a hill is 60°.
[tex]\angle PAB + \angle BAQ= 180^o\text{(Supplementary angles)}\\\\ \angle BAQ= 180^o-\angle PAB \\\\ \angle BAQ=180^o-60^o=120^oC[/tex]
The measure of the greatest angle of a tree with a hill is 120°.
Learn more about complementary and supplementary angles here:
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What type of graph is best to use to show changes over time?
A. bar graph
B. line graph
C. histogram
D. circle graph
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Answer:
You're answer should be (B) Line graph
Step-by-step explanation:
Answer:
line graph
EXPLANATION
trust me g
Is (-1,2) a solution to the following system of equations? Show and explain why or why not.
f(x)=x^2+3x+4
g(x)=2x+4
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Answer:
It is a solution.
Step-by-step explanation:
Plug in (-1,2) to both equations:
Plug in -1 to see if 2 comes out:
f(x)=x^2+3x+4
y=(-1)^2+3(-1)+4
y=1-3+4
y=-2+4
y=2
(yes it works)
g(x)=2x+4
y=2(-1)+4
y=-2+4
y=2
(yes it works)
Given: ∠P ≅ ∠Q and Line Segment RS bisects ∠PQR. Prove: Line segments PR≅QR . Supply the missing statement in Statement 5 of the proof of the the Converse of the Isosceles Triangle Theorem.
Begin with isosceles ∆PRQ with ∠P ≅ ∠Q. Construct Line Segment RS a bisector of ∠PRQ.
A. ∆PRS ≅ ∆PRQ
B. ∆PRS ≅ ∆PRS
C. ∆PRS ≅ ∆SRQ
D. ∆PRS ≅ ∆QRS
Answers
Answer:
D
Step-by-step explanation:
Vertices P and Q correspond, vertices R and S correspond to themselves.
By the property of (Angle-Angle-Side)AAS postulates ΔPRS≅QRS
Option (D) is correct.
It is required to find the missing statement in Statement 5 of the proof.
What is congruence in Triangle?Congruent triangles are triangles that have the same size and shape. This means that the corresponding sides are equal and the corresponding angles are equal.
Given that:
∠P ≅ ∠Q and Line Segment RS bisects ∠PQR.
In ΔPRS≅QRS ,
∠P≅∠Q (Given)
∠PRS≅∠QRS (Definition of angle bisector)
RS≅RS (reflexive property of congruence)
so,ΔPRS≅QRS (By AAS congruence)
Therefore, by the property of (Angle-Angle-Side)AAS postulates ΔPRS≅QRS
Learn more about the congruence in triangle here:
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solve the equation for x 5x squared - 4x = 6
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A circle with the center C (4, -2) contains the point D (8,1). What is the equation of the line perpendicular to the radius of the circle passing through point C?
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Answer:
y = -4x/3 + 10/3
Step-by-step explanation:
We find the slope of CD and get (-2 - 1)/(4 - 8) = -3/-4 = 3/4
The slope of a perpendicular line is the opposite reciprocal of the slope of the line it's perpendicular to, so we get a slope of -4/3.
We can use point-slope form and get (using point C):
y - (-2) = (-4/3)(x - 4) -->
y + 2 = -4x/3 + 16/3 -->
y = -4x/3 + 10/3
**NOTE** I can't see the picture (because of a problem on my computer) so if there is any info given there that isn't given in the text, then my answer will be incorrect.
1. A certain small factory employs 98 workers. Of these, 10 receive a wage of $150 per day and the rest receive $85.50 per day. To the management, a week is equal to 6 working days. How much does the factory pay out for each week
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Answer:hello I'm from Philippines
Step-by-step explanation:
When a result from a simple is extended to the population
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Answer:
You can opt to study the entire population when the population is well defined(Complete sampling frame) and small.
It can eliminate any potential bias occurring through sampling technique, but other than that it is really not justified to consume more resources and time.
What is nineteen minus twelve divided by six
19 - 12 / 6
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Answer:
17
Step-by-step explanation:
Using PEMDAS you divide first and get 2
19-2
then you get 17 as your final answer
6+8x/2=5x solve for X
Answers
6+8x = 5x(2)
6+8x = 10x
6=10x-8x
6=2x
6/2=x
3=x
x=3
What is 84, percent of 300?
Answers
Answer:
252
Step-by-step explanation:
.84 times 300 = 252
Answer:
252%
Step-by-step explanation:
I did the Khan Academy.
They need to park the Mystery Machine. They could
either park in the lot that charges $5 and then $2 an
hour, or they could park using the meter on the street
that charges $3.75 per hour.
Write an equation that describes when the cost is the
same at both locations (the parking lot and on the
street).
Answers
Answer:
12 hours in the street=20 hours in the lot
Step-by-step explanation:
Well basically if you're at the street for 12 hours it will add up to 45 dollars. subtract the 5 starting dollars and you get 40. Divide 40 by 2 and you get 20. What does this mean? This means that in 12 hours on the street you can match the same amount of money if you were in the lot for 20 hours.