At t seconds, the height h, in feet, of a baseball pitched into the air is given by the function below. When does the ball hit the ground?

Question

h(t)=-16t²+20t+8

Answer 1

h=0 = -16t^2 +20t +8

at ground level h=0

use the quadratic formula

t = -20/-32 + (1/32)sqr(20^2 +4(16)(8))

t = 5/8 + sqr(912)/32

= .625 + 30.2/32

= .625 + .944

= 1.569 seconds to fall to the ground