SOLUTION: Word Problem Help A ball is thrown from an initial height of 4 feet with an initial upward velocity of 31 ft/s. The ball's height h (in feet) after t seconds is given by the fol

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Question 1181268: Word Problem Help
A ball is thrown from an initial height of 4 feet with an initial upward velocity of 31 ft/s. The ball's height h (in feet) after t seconds is given by the following.


Find all values of for which the ball's height is 18 feet.
Round your answer(s) to the nearest hundredth.

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

if feet
.......solve for



use quadratic formula to calculate
.....you have ,,




solutions:
=>=>
=> =>


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