Mathematics, 04.11.2021 14:00 543670

Keith is in a hot air balloon that is 200 feet above the ground and 1 is ascending I feet per second. Erica is in a hot air balloon that is 548 feet above the ground and is descending if feel per second. After how many seconds will the hot air balloons be the same number of feet above the ground?

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Keith is in a hot air balloon that is 200 feet above the ground and 1 is ascending I feet per second...