Find the time in seconds that the football
One of the 2 questions I am having problem with. The height in feet of a football as a function of time in seconds is given by f(t) = -16.1t2 + 64.4t + 79.8. Find the time in seconds that the football is 90 feet above the ground.
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An especially violent lightning bolt has an average current of 2.86 x 103 A lasting 0.220 s. How much charge is delivered to the ground by the lightning bolt?
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