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Sholpan [36]
4 years ago
6

Part A A high school athlete ran the 100 meter sprint in 13.245 seconds. Round the time to the nearest tenth.Part B Explain how

you arrived at the answer. Include any rules that you followed.
Mathematics
1 answer:
amid [387]4 years ago
5 0

Answer:

t = 13.2 s

Step-by-step explanation:

Given that,

An athlete ran the 100 meter sprint in 13.245 seconds. We need to round off the time to the nearest tenth.

Here, t = 13.245 s

In order to round off to the nearest tenth, thousandths place and hundredth place gets eliminated.

So, t = 13.2 s

So, time is 13.2 seconds.

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2. One of the offices at the company was being repainted. Riley’s mother challenged him to figure out how many quarts of paint w
beks73 [17]
Not enough information. The question doesn't say how much one quart of paint covers.

EDIT: here's the solution

we have to find the total area of the 4 walls and subtract the area of the door. there are 2 walls with dimensions 16 by 10, and 2 walls with dimensions 16 by 12. so we have: 2(16*10)+2(16*12)=320+384=704 for the area of the walls. now, we can find the area of the door which is 3*8=24. <span>so we subtract the area of the door from the area of the walls, so we have: 704-24=680. </span><span>Since a quart of paint covers 100, then we divide and get 680/100=6.8 but since we need a whole number of quarts, we round up to get 7 quarts of paint. </span>
4 0
3 years ago
After computing a confidence interval, the user believes the results are meaningless because the width of the interval is too la
navik [9.2K]

Answer:

The best recommendation is to: Increase the sample size.

Step-by-step explanation:

The width of a confidence interval  W=2\times CV\times \frac{SD}{\sqrt{n}} ,depends on three things,

  1. Sample size (n)
  2. Standard deviation
  3. Confidence level

To decrease the width the following options can be used:

  • Increase the sample size.

Since the sample is inversely proportional to the width of the confidence interval, increasing the value of <em>n</em> will decrease the width.

  • Decrease the standard deviation.

The standard deviation is directly proportional to the width of the confidence interval. On decreasing the standard deviation value the width of the interval will also decrease.

  • Decrease the confidence level.

The critical value of the distribution is based on the confidence level. Higher the confidence level, higher will be critical value.

So, on deceasing the confidence level the critical value will decrease, hence decreasing the width of the interval.

Thus, the best recommendation is to: Increase the sample size.

3 0
3 years ago
PLZZZZZZZZZZZZZZZZ HELPPPPPPPPPPPPPPPP
vodomira [7]

Answer:

Both the radius and height of the cylinder are 2.48 cm.

Step-by-step explanation:

V = π r2 h

(where r is the radius and h is the height.)

However, in the problem statement, we were told that the radius equals the height or "r = h"

So, we can rewrite the above equation as:

V = π r2*r = π r3

Now we just have to solve for r

r3 = V/π

r = (V/π)1/3

r = (48/π)1/3=2.48 cm

8 0
3 years ago
Read 2 more answers
Find the slope of the line perpendicular to the given points. Use / for a fraction.<br> Explain how
stiv31 [10]

Answer:

i think -1/26

Step-by-step explanation:

(y2 - y1) / (x2 - x1)

(-15+16) /(-7-19)

1/-26

6 0
4 years ago
Min-jun travels 27 miles per hour. How long does it take him to travel 21 miles. Nearest tenth
Advocard [28]

Answer:

0.8 hours

Step-by-step explanation:

From the question;

  • Speed of Min-jun is 27 miles per hour
  • Distance covered is 21 miles

We need to determine the time he takes to cover the distance given;

We need to know that;

Speed = Distance ÷ time

Rearranging the formula;

time = Distance ÷ speed

Thus;

Time = 21 miles ÷ 27 miles per hour

        = 7/9 hours

        = 0.8 hours

Thus, he took 0.8 hours to cover the distance covered

7 0
3 years ago
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