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Tasya [4]
3 years ago
6

Help me. I'll mark brainiest

Mathematics
1 answer:
enot [183]3 years ago
5 0
X^2 - 6x + 9 = 25 + 9
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(Lots of points)PLEASE HELP ME Due today at 8:59 in Texas
IceJOKER [234]

Answer:

6.) So 8 of 24 hours is 1/3. So the percent of his time used was <u><em>33.33333 . . %</em></u> (etc)

7.) The easiest way to figure out a percentage is dividing it. So if it was 30 hit out of 75 people, then divide 30 by 75. So <u><em>40%</em></u> of them got hit.

Hope that helps

6 0
3 years ago
Mathematical Statistics with Applications Help Homework
Mars2501 [29]

7.43: Let X denote the random variable for height and \overline X for the sample mean. Then if \mu is the mean of

So the probability that the difference between the sample and population means does not exceed 0.5 inch is

P(|\overline X-\mu|\le0.5) = P\left(\left|\dfrac{\overline X-\mu}{0.25}\right|\le\dfrac{0.5}{0.25}\right) = P(|Z|\le 2) \approx \boxed{0.95}

per the empirical or 68/95/99.7 rule.

7.44: For a sample of size <em>n</em>, the sample standard deviation would be \frac{2.5}{\sqrt n}. We want to find <em>n</em> such that

P(|\overline X-\mu| < 0.4) = 0.95

Comparing to the equation from the previous part, this means we would need

\dfrac{0.4}{\frac{2.5}{\sqrt{n}}} = 0.16\sqrt n = 2 \implies \sqrt n = 12.5 \implies n = 156.25

so a sample of at least 157 men would be sufficient.

7 0
3 years ago
A cylinder has a radius of 9 inches and a height of 5 inches. What is the volume and surface area of the cylinder?​
Licemer1 [7]
The answer is:
v ≈ 1272.35 in^3

Sorry if this does not help.
4 0
3 years ago
Read 2 more answers
Casey started a puzzle yesterday and completed 63 of the pieces. Today, he is
liq [111]

Answer:

4 pieces a minute

Step-by-step explanation:

115 minus 63 equals 52. 52 is what they did in 13 minutes so 52 divided by1 3 is 4 so 4.

7 0
3 years ago
Sarah made $180 for 12 hours of work. At the same rate, how much would he make for 17 hours of work?
lisabon 2012 [21]

Answer:

1260

Step-by-step explanation:

180 x 2

8 0
3 years ago
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