The marginal price for a weekly demand of x bottles of cough medicine in a drug store is -13,300 (5x + 40)2 given by P'(x) = Find the price- demand equation if the weekly demand is 125 when the price of a bottle of cough medicine is $4. What is the weekly demand (to the nearest bottle) when the price is $3? Select one: А. 5,320 p(x) = 347 bottles 5x +. 2,660 В. p(x) = + 8; 98 bottles 5x + 40 C. p(x): 2,660 169 bottles 5x + 40' 5,320 D. p(x) = - 4; 144 bottles 5x + 40

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