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nalin [4]
3 years ago
14

DO THE PROBLEM DOWN BELOW I WILL MARK BRAINLIEST AND GIVE 10 POINTS:Unit 1: Ratios and Rates Answer the questions below. Total s

core: ____ of 15 points (Score for Question 1: ___ of 4 points) 1. Mrs. Jolley is thinking of buying solar panels to put on the roof of her new house. The Sunny Solar Company told her that for every 2 panels, she will save $60 on her electric bill. (a) Draw a model or make a visual representation for the ratio of the panels to the money that she will save on her electric bill. (b) Write the ratio of panels to money saved as a reduced fraction. Show your work   (Score for Question 2: ___ of 5 points) 2. Mrs. Jolley likes that she can save money on her electric bill by going solar, but she needs to know how much it is going to cost to set up her new system. She figures that it should take about 9 panels to start. They sent her the following prices of solar panels: # panels Price ($) 2 3,000 3 4,500 5 7,500 9 ? (a) What is the price per of each panel? Show your work—make sure to show at least two different calculations to show they both have the same answer. (b) How much will 9 panels cost her? Show your work.   (Score for Question 3: ___ of 6 points) 3. Mrs. Jolley has determined that she does want to go ahead and get those solar panels installed. Now she has to find an installer. Her friends have also had solar installed and here are the companies that they used, how many hours they took to install their panels and their total price: Company # of hours Total price (in dollars) ABC Co. 5 128 Solar R’ Us 6 181 Light in the Sky 8 195 (a) What is the price per hour for each company? Show your work and remember your rounding rules. (b) Which company is the best deal? Explain
Mathematics
1 answer:
True [87]3 years ago
8 0
I don’t know about Question One, but I can do the other two.

Question Two:
Since the first one is 2 for 3000, you divide 3000/2 and get 1500. If you do the same for 4500/3 and 7500/5, you will find that 1500 is the answer to all of them. Each panel is 1500$. If you multiple 1500$ by 9, you will get 13,500$

Question 3:
To find each, you need to divide the total price by the number of hours. The first company is 128/5, making it 25.60$ per hour. The second company is 181/6, making it 30.17$ per hour. Finally, the third company is 195/8, making it 24.38$ per hour. The best deal would be the final one because it costs the least per hour.
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aivan3 [116]
You can't round 125 cause 125 it's all ready rounded
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3 years ago
A medical website states that 40% of U.S. adults are registered organ donors. A researcher believes that the proportion is too h
alexgriva [62]

Answer:

Pvalue = 0.193

There is not enough evidence to conclude that the proportion of registered organ donors is less than 40%

Step-by-step explanation:

H0 : p = 0.4

H1 : p < 0.4

Test statistic :

z=pˆ−p/√p(1−p)/n

pˆ = 74 / 200 = 0.37

Z = (0.37 - 0.40) / √(0.40(1 - 0.40) / 200

Z = - 0.03 / √0.0012

Z = - 0.03 / 0.0346410

Z = - 0.866

Test statistic = -0.866

The Pvalue :

P(Z < -0.866) = 0.193

α - level = 0.05

If Pvalue < α ; Reject H0

Since Pvalue > α ; There is not enough evidence to conclude that the proportion of registered organ donors is less than 40%

3 0
3 years ago
15 POINTS !!!!
Natalija [7]
So the answer would be A. I had a bit of trouble figuring this out, but then I went to Order of Operations and found it out. 

So you fill in n, and I just used 9 since it's in the question. So then, subtract 1 from 9, giving you 8. Then you multiply 0.35 by 8, giving you 2.8. Now lastly, add 7.51, and you get 10.31

I hope this helps you! If it does, please rate as Brainliest :D
3 0
3 years ago
Read 2 more answers
What is the image of (1,0) after a counterclockwise rotation of 60 degrees?
Anestetic [448]

Answer:

\vec s = \left(\frac{1}{2},\frac{\sqrt{3}}{2}  \right)

Step-by-step explanation:

The coordinate has the following polar form:

\vec r = (1, 0^{\circ})

The image of the coordinate rotated counterclockwise 60° is:

\vec s = (1, 60^{\circ})

Its equivalent form in rectangular coordinates is:

\vec s = (1\cdot \cos 60^{\circ}, 1 \cdot \sin 60^{\circ})

\vec s = \left(\frac{1}{2},\frac{\sqrt{3}}{2}  \right)

3 0
3 years ago
Anna has been adding $30 to her savings account every month. Which model could represent the money in Anna’s savings account (y)
RSB [31]

Y=30x.
Whatever the number of months is you times by 30, the amount she added each month. If she had started with a certain amount you would add that to the equation. Y is the total money in the account.
7 0
4 years ago
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