Mathematics, 07.12.2020 04:10 bankscorneliuso39

A submarine on the surface of the ocean descended at a rate of 7 feet per second for 2 minutes. Then it ascended at a rate of 4 feet per second for 3 minutes, Finally, it descended at a rate of 9 feet per second for 5 minutes. What was the final elevation of the submarine?

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A submarine on the surface of the ocean descended at a rate of 7 feet per second for 2 minutes. Then...