Answer:
1.118 seconds
Step-by-step explanation:
h =50
h = –16t^2 + 70
substitute h=50
50 = –16t^ 2 + 70
subtract 70 from each side
50 - 70 = -16t^2
-20 = -16 t^2
divide each side by -16
-20/-16 = t^2
1.25 = t^2
take the square root of each side
sqrt(1.25) = sqrt(t)
we only take the positive because time can only be positive
1.118 =t
