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Nataliya [291]
3 years ago
7

A ball is thrown from an initial height of 7 feet with an initial upward velocity of 30ft/s . The ball's height h (in feet) afte

r t seconds is given by the following. h=7+30t-16t^2
Find all values of t for which the ball's height is 20 feet.
Round your answer(s) to the nearest hundredth.

t = —— seconds
Mathematics
1 answer:
exis [7]3 years ago
4 0
This is a parabola. 20 ft represents the height of the ball. Height is represented by the letter h. Thus you need to plug 20 into the equation for h and solve for t.
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