Answer: The point estimate of the population mean is <u>25</u>.
The margin of error for the confidence interval is <u>3</u> .
Step-by-step explanation:
The confidence interval for population mean is given by :-
, here
is the point estimate of the population mean and E is the margin of error .
As per given , we have
Lower bound of CI =
(1)
Upper bound of CI =
(2)
Add (1) and (2) , we get

Subtract (1) from (2) , we get

Hence, the point estimate of the population mean is <u>25</u>.
The margin of error for the confidence interval is <u>3</u> .
X=(180-50-55)
x=75°
............
6a. y=-8(x-10)²
6b. y=(.15)(x+6)²
Add all the times together:
10 + 25 + 15 = 50 minutes total.
For the ratio divide the time for weights by total time:
25/50 which reduces to 1/2
The ratio is 1/2
The answer is C, the function is not following constant change, so not linear, and if it was .1^x, then it would be 1.4 instead of 12.6. So C is correct.