Question 1162031
h=-16t^2+60t+30
vertex is at t=-b/2a=-60/-32
a is the coefficient of the t^2 term or -16
b is the coefficient of the t term or 60
so -b/2a=-60/2(-16)
=60/32 seconds or 1.875 seconds
f(1.875)=86.25 feet


{{{graph(300,300,-5,5,-50,100,-16x^2+60x+30)}}}