Solve the Problem $t$ Seconds Is Given By $h = - 9.8 \mathrm { t } ^ { 2 } + 78.4 \mathrm { t }$

question 161

Multiple Choice

Solve the problem.
-If a rocket is propelled upward from ground level, its height in meters after $t$ seconds is given by $h = - 9.8 \mathrm { t } ^ { 2 } + 78.4 \mathrm { t }$ . During what interval of time will the rocket be higher than $147 \mathrm {~m}$ ?

• A) \(0 < t < 3\)
• B) \(3 < t < 5\)
• C) \(5 < t < 6\)
• D) \(6 < t < 8\)

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