Question

Heather hits a tennis ball upward with an initial speed of 32 feet per second. After how many seconds does the ball hit the ground? Use the formula h = rt - 16t^2 where h represents height in feet and r represents the initial speed.

Answer 1

set
\(h=0\) and solve for \(t\)

Answer 2

So:
0 = 32t - 16^2

Answer 3

\[32t-16t^2=0\]
\[16t(2-t)=0\]
\[t=2\]

Answer 4

Thank you!

Answer 5

yw