4 years ago

C=37, a=12 find missing side length

1 answer:

5 0

A^2 +B^2= c^2

12^2 +B^2= 37^2

144+B^2= 1369

Subtract 144 from both sides
B^2= 1225
Take the square root of 1225

B=35

Missing side is 35

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Denise is a professional swimmer who trains, in part, by running. she would like to estimate the average number of miles she run

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Given:
n = 20, sample size
xbar = 17.5, sample mean
s = 3.8, sample standard deiation
99% confidence interval

The degrees of freedom is
df = n-1 = 19

We do not know the population standard deviation, so we should determine t* that corresponds to df = 19.
From a one-tailed distribution, 99% CI means using a p-value of 0.005.
Obtain
t* = 2.8609.

The 99% confidence interval is
xbar +/- t*(s/√n)

t*(s/√n) = 2.8609*(3.8/√20) = 2.4309
The 99% confidence interval is
(17.5 - 2.4309, 17.5 + 2.4309) = (15.069, 19.931)

Answer: The 99% confidence interval is (15.07, 19.93)

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4 years ago

1/5 divided by 5/8=<br> Please help me !!

Neporo4naja [7]

Answer:

8/ 25

Step-by-step explanation:

hope it helps!

.....

5 0

3 years ago

Let f(x) =7x-13. Find f -1(x)