SOLUTION: A window washer is suspended 38 feet below the roof of the 1127-foot-tall John Hancock Center in Chicago. If the window washer drops an object from this heght, the object's height
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Question 276568: A window washer is suspended 38 feet below the roof of the 1127-foot-tall John Hancock Center in Chicago. If the window washer drops an object from this heght, the object's height h after t seconds is given by the equation h=-16t^2+1089. Find how many seconds pass before the object reaches the ground.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A window washer is suspended 38 feet below the roof of the 1127-foot-tall John Hancock Center in Chicago. If the window washer drops an object from this heght, the object's height h after t seconds is given by the equation h=-16t^2+1089. Find how many seconds pass before the object reaches the ground.
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It hits the ground when h = 0
h=-16t^2+1089 = 0
16t^2 = 1089
4t = 33
t = 8.25 seconds
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