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Water is poured into a container that has a small leak. The mass m of the water is given as a function of time t by m - 7.00t0.8 - 1.40t +30.50, with t 2 0, m in grams, and t in seconds (a) At what time is the water mass greatest? (b) What is that greatest mass? 9 (c) In kilograms per minute, what is the rate of mass change at t- 2.00 s? (d) In kilograms per minute, what is the rate of mass change at t5.00 s? kg/min

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