Solve the Problem $h = - 9.8 \mathrm { t } ^ { 2 } + 58.8 \mathrm { t }$

Multiple Choice

Solve the problem.
-If a rocket is propelled upward from ground level, its height in meters after t seconds is given by $h = - 9.8 \mathrm { t } ^ { 2 } + 58.8 \mathrm { t }$ . During what interval of time will the rocket be higher than $78.4 \mathrm {~m}$ ?

A) $4 < t < 6$
B) $2 < t < 4$
C) $4 < \mathrm { t } < 4$
D) $0 < t < 2$