Question

Help! Medals!

Answer 1

Rebekah kicks a soccer ball off the ground and in the air with an initial velocity of 25 feet per second. Using the formula H(t) = -16t2 + vt + s, what is the maximum height the soccer ball reaches?

A.) 9.5 feet

B.) 9.8 feet

C.) 10.2 feet

D.) 10.7 feet

Answer 2

d/dt(-16t² + 25t) =-32t + 25
-32t + 25 = 0
32t = 25
t = 25/32 sec
now put value of t
H = -16(0.7813)² + 25(0.7813) = -16( 0.6104) + 25(0.7813) =
= -9.767 + 19.533 = 9.766 = 9.8 feet

Answer 3

Ok, thank you!