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The demand function for a certain brand of compact discs is given by p = -5x2 - 4x + 105 where p is the wholesale

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The demand function for a certain brand of compact discs is given by p = -5x2 - 4x + 105 where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. (a) Compute the price, p, when x = 4. Price, p = dollars (b) Use implicit differentiation to compute the rate of change of demand with respect to price, p, when x = 4, Do not round your answer, Rate of change of demand, x' = thousands of units per dollar (c) Compute the elasticity of demand when x = 4. Do not round your answer, Elasticity of Demand = 8. [-/1 Points] DETAILS Math 110 Course Resources -Implicit Differentiaion & Related Rates Course Packet on computing elasticity of demand using implicit differentiation The yearly demand function for Penn State Bakery cookie trays is given by x7 + 4p? + 8x + 8p = 212 where p is the wholesale unit price in dollars and x is the quantity demanded each year, measured in units of a thousand. (a) Compute the price, p, when x = 10. Price, P = dollars (b) Use implicit differentiation to compute the rate of change of demand with respect to price, p, when x = 10. Do not round your answer. Rate of change of demand, x thousands of units per dollar (c) Compute the elasticity of demand when x - 10. Do not round your answer. Elasticity of Demand

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