Solve the Problem $h$ Of the Object After $t$ Seconds Is Given by the Quadratic Equation

question 53

Multiple Choice

Solve the problem.
-An object is thrown upward from the top of a 160 -foot building with an initial velocity of 48 feet per second. The height $h$ of the object after $t$ seconds is given by the quadratic equation $h = - 16 t ^ { 2 } + 48 t + 160$ . When will the object hit the ground?

• A) \(5 \mathrm { sec }\)
• B) \(160 \mathrm { sec }\)
• C) \(2 \mathrm { sec }\)
• D) \(- 2 \mathrm { sec }\)

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