Your Answer is

Correct Answer is H

Explanation

Substitute h=32 into the formula, you can get 32+16t²-48t=0.

Simplify and get: t² -3t+2=0

(t-1)(t-2)=0

t₁=1, t_{2< /sub>=2}

Because the opening of the parabola represented by the equation is downward, the intersection coordinates of the curves of all ascending stages and the x-axis are smaller solutions, so t=1,

Choose H