Question 201852
An angry contruction worker throws his wrench downward from a height of 128 ft with an initial velocity of 32 feet per second. The height of the wrench above the ground after t seconds is given by
S(t) = -16r - 32r + 128 
A. What is the height of the wrench after 1 second?
B. How long does it take for the wrench to reach the ground?
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You have r's in a function that's S(t) ??
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h(t) = -16t^2 -32t + 128
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A. h(1) = -16 - 32 + 128
h(1) = 80 feet
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B. -16t^2 - 32t + 128 = 0
t^2 + 2t - 8 = 0
(t+4)*(t-2) = 0
t = 2 seconds to reach the ground