Answer:
A
Step-by-step explanation:
Because if you simplify you get that
Answer:

And replacing:

And the deviation:

And the distribution is given:

Step-by-step explanation:
For this case we have the following info given :

And the deviation would be 
For this case we select a sample size of n = 5 and the distirbution for the sample mean would be:

And replacing:

And the deviation:

And the distribution is given:

The ball was initially thrown from a height of 5.5 feet and 5.5 is y intercept that it throm from 5.5 feet.
I would set this up as a a proportion:

·
17x = 1360
x = 20 cm
N= 75 (let me know if you need more help)