A projectile is thrown upward so that its distance above the ground after $t$ sec is given by $h(t)=-15 t^{2}+600 t$. After how many seconds does it reach its maximum height?
A) $10 \mathrm{sec}$
B) $20 \mathrm{sec}$
C) $30 \mathrm{sec}$
D) $40 \mathrm{sec}$

Question

Quizplus · Accepted Answer

The Answer of A projectile is thrown upward so that its distance above the ground after $t$ sec is given by $h(t)=-15 t^{2}+600 t$. After how many seconds does it reach its maximum height?
A) $10 \mathrm{sec}$
B) $20 \mathrm{sec}$
C) $30 \mathrm{sec}$
D) $40 \mathrm{sec}$

A Projectile Is Thrown Upward So That Its Distance Above ttt

A Projectile Is Thrown Upward So That Its Distance Above $t$