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

question 113

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) \(0 < t < 2\)

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