You are riding a roller coaster when a shoe falls off your foot. The function y=200βˆ’16t^2 represents the height y (in feet) of the shoe t seconds after it falls off your foot. The shoe lands on the top of a 31-foot-tall building. After how many seconds does the shoe hit the building?

Question
Answer:
A graphing calculator shows it takes 3.25 seconds for the shoe to hit the building.

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200 -16t^2 = 31
169 = 16t^2
√(169/16) = t
t = 13/4 = 3 1/4
solved
general 10 months ago 1685