The resale value R (m dollars) of a particular type of laser cutting tool t years after its initial purchase is approximated by R(t) = 700,000e 0 224 a. What is the decay rate of the resale value? Note: The decay rate will be negative. b. Find the rate at which the resale value is changing 5 years after the initial purchase. R' (5) c. Find the rate at which the resale value is changing 15 years after the initial purchase. R' (15)

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