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Find the rate of change of total revenue, cost, and prot with respect to time. Assume that R(x) and C(x) are in dollars. R(x) = 50x - 0.5x2, C(x) = 3): +15, when x = 25 and dx/dt=15 units per day <: the rate of change total revenue is per day. cost profit dy dx assume x and y are functions t. evaluate for in with conditions="9," dt . an exact answer simplified form. mailing service places a limit in. on combined length girth around package to be sent parcel post. what dimensions rectangular box square crosssection will contain largest volume that can mailed there two different girths. in.3>