Solve the Problem $t$ Seconds Is Given by the Equation $h ( t ) = - 16 t ^ { 2 } + 144 t + 160$

question 510

Multiple Choice

Solve the problem.
-If an object is propelled upward from a height of 160 feet at an initial velocity of 144 feet per second, then its height after $t$ seconds is given by the equation $h ( t ) = - 16 t ^ { 2 } + 144 t + 160$ . After how many seconds does the object hit the ground?

• A) \(11 \mathrm { sec }\)
• B) \(5.0 \mathrm { sec }\)
• C) \(9.0 \mathrm { sec }\)
• D) \(10 \mathrm { sec }\)

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