Question 1077665
h(t) = -16t^2 + 48t + 4
Let h(t)=0, and solve for the positive root
Divide by 4
-4t^2+12t+1=0 or 4t^2-12t-1=0
t=(1/8)(12+/- sqrt (144+16); sqrt 160=12.65
t=24.65/8=3.08 sec
{{{graph(300,300,-5,5,-10,50,-16x^2+48x+4)}}}