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Mathematics, 15.12.2020 03:20 lerasteidl

PLEASE HELP ME I ONLY HAVE 20 MINUTES The height of a tennis ball
tossed into the air is modeled by h(x) = 40x -16x^2, where x is elapsed time in seconds. During what time interval will the tennis ball be at least 15 feet above the ground?

I’m pretty sure it’s D but I need an explanation why!!!


PLEASE HELP ME I ONLY HAVE 20 MINUTES The height of a tennis ball tossed into the air is mode

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