The answer is 37, you add up all the numbers and divide whatever number you got by the amount of numbers there are :)
From the model given:
h(t)=-16t^2+50t+10
at the maximum height h'(t)=0
from the function:
h'(t)=-32t+50
thus
-32t+50=0
t=50/32
thus at maximum height:
t=50/32~1.5625
hence, the maximum height will be:
distance=speed*time
distance=1.5625×50
=78.125 ft
