The number q of roller blades a firm is willing to sell per week at a price of $p is given by q = 60 (square root of p+25 )+300 for 20 (less than or equal to) p (less than or equal to) 100. a)  Find dq / dp b)  Find the amount supplied when the price is $56. c) Find the instantaneous rate of change of supply with respect to price when the price is $56.

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