# SOLUTION: Set up equation for problem and solve 1) An object is thrown up in the air at a velocity of 20 ft/sec. The height of the object t seconds after it is thrown is given by the fun

Algebra ->  Algebra  -> College  -> Linear Algebra -> SOLUTION: Set up equation for problem and solve 1) An object is thrown up in the air at a velocity of 20 ft/sec. The height of the object t seconds after it is thrown is given by the fun      Log On

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 Question 393274: Set up equation for problem and solve 1) An object is thrown up in the air at a velocity of 20 ft/sec. The height of the object t seconds after it is thrown is given by the function h(t)= -16t^(2)+20t . How long will it take for the object to hit the ground? Answer by stanbon(57347)   (Show Source): You can put this solution on YOUR website!An object is thrown up in the air at a velocity of 20 ft/sec. The height of the object t seconds after it is thrown is given by the function h(t)= -16t^(2)+20t . How long will it take for the object to hit the ground? ------------- Height is zero when the object hits the ground. --- Solve: -16t^2+20t = 0 -4t(4t-5) = 0 Positive solution: t = 5/4 = 1 1/4 seconds ========================== Cheers, Stan H.