Depreciation Rate The depreciation rate r for a $50,000 new car is given by the function,...

Depreciation Rate The depreciation rate r for a $50,000 new car is given by the function, where V is the value of the car when it is five years old.

a. What is the depreciation rate for a $50,000 BMW that is worth $28,000 after 5 years?

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b. Write Fas a function of r.