Solve the Problem
-An Object Is Propelled Vertically Upward from the Top

question 135

Multiple Choice

Solve the problem
-An object is propelled vertically upward from the top of a 32 -foot building. The quadratic function $s ( t ) = - 16 t ^ { 2 } + 160 t + 32$ models the ball's height above the ground, $s ( t )$ , in feet, $t$ seconds after it was thrown. How many seconds does it take until the object finally hits the ground? Round to the nearest tenth of a second if necessary.

• A) 2 seconds
• B) \(10.2\) seconds
• C) 5 seconds
• D) \(0.2\) seconds

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Definitions:

Conifers

A group of cone-bearing plants that are mostly evergreens and include pines, firs, and spruces.

Sepal

One of the outermost parts of a flower, usually leaflike in appearance, that protects the flower as a bud.

Flower Bud

A flower bud is a small embryonic flower, encased in protective scales, which develops into a mature flower upon growth and favorable conditions.

Protect

To cover or shield from exposure, injury, damage, or destruction.