Answer:
64.4 miles per hour
Step-by-step explanation:
divide the amount of miles by the amount of hours to get miles per hour
Answer: 10.3 s
Step-by-step explanation:
Given
The height of the arrow is given by 
At
and 
When arrow hits ground, h becomes 0 i.e.

Neglecting the negative value of t
So, the arrow hits the ground after 10.30 s
Answer:
D
Step-by-step explanation:
they all add up by 3