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Mathematics 12 Online
OpenStudy (anonymous):

An equation for the depreciation of a car is given by y = A(1 – r)t , where y = current value of the car, A = original cost, r = rate of depreciation, and t = time, in years. The value of a car is half what it originally cost. The rate of depreciation is 10%. Approximately how old is the car? 3.3 years 5.0 years 5.6 years 6.6 years

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