The time t (in hours) that it takes a pump to empty a tank of water varies inversly with the pumping rate r (in gallons per hour). Find the constant of variation if it takes 3 hours to empty a tank of water when the pumping rate is 80 gallons per hour.

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints

the answer is b.)

< 1=< 2

sorry man i accidentally pressed yes my bad

step-by-step explanation:

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step-by-step explanation: