Solve each problem. See Example 8.If an object is projected upward from ground level on
Chapter 9, Problem 39(choose chapter or problem)
Solve each problem. See Example 8.If an object is projected upward from ground level on Earth with an initial velocity of 96 ftper sec, its altitude (height) s in feet in t seconds is given by the formula s = -16t2 + 96t.At what times will the object be at a height of 80 ft? (Hint: Let .)
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