Solve the problem.
-If a rocket is propelled upward from ground level, its height in meters after $t$ seconds is given by $h ( t ) = - 9.8 t ^ { 2 } + 98 t$. During what interval of time will the rocket be higher than $235.2 \mathrm {~m}$ ?
A) $6

Question

Solve the problem.
-If a rocket is propelled upward from ground level, its height in meters after $t$ seconds is given by $h ( t ) = - 9.8 t ^ { 2 } + 98 t$. During what interval of time will the rocket be higher than $235.2 \mathrm {~m}$ ?
A) $6 < t < 8$
B) $8 < t < 10$
C) $0 < t < 4$
D) $4 < t < 6$

Quizplus · Accepted Answer

The rocket will be higher than 235.2 m when $h(t) > 235.2$. Solving this inequality gives $4 < t < 6$.

Solve the Problem ttt Seconds Is Given By h(t)=−9.8t2+98th ( t ) = - 9.8 t ^ { 2 } + 98 th(t)=−9.8t2+98t

Solve the Problem $t$ Seconds Is Given By $h ( t ) = - 9.8 t ^ { 2 } + 98 t$