Solve the problem.
-An explosion causes debris to rise vertically with an initial velocity of 112 feet per second. The function $$s ( t ) = - 16 t ^ { 2 } + 112 t$$ describes the height of the debris above the ground, s(t), in feet, t seconds after the explosion. What is the instantaneous speed of the debris when it hits the ground?
A) 224
B) -224
C) -112
D) 112

Question

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The Answer of Solve the problem.
-An explosion causes debris to rise vertically with an initial velocity of 112 feet per second. The function $$s ( t ) = - 16 t ^ { 2 } + 112 t$$ describes the height of the debris above the ground, s(t), in feet, t seconds after the explosion. What is the instantaneous speed of the debris when it hits the ground?
A) 224
B) -224
C) -112
D) 112

Solve the Problem s(t)=−16t2+112ts ( t ) = - 16 t ^ { 2 } + 112 ts(t)=−16t2+112t

Solve the Problem $s ( t ) = - 16 t ^ { 2 } + 112 t$