Susan throws a softball upward into the air at a speed of 32 feet per second from a 152 dash foot platform. The distance upward that the ball travels is given by the function d(t)=16t2+32t+152. What is the maximum height of thesoftball? How many seconds does it take to reach the ground after first being thrownupward? (Round your answer to the nearesttenth.

I found the vertex of 1 but i'm lost on everything else

How do i find the mxheight?