Question

Help

Answer 1

@helder_edwin @wolf1728 could u do this.

Answer 2

for part A) u have s=100 and v=60 so
\[\large H(t)=-16t^2+60t+100 \]
solve H(t)=0.

Answer 3

for part B) u cas use calculus or complete the square to get the equation of a parabola