The resale value R (in dollars) of a particular type of laser cutting tool t years after its initial purchase is approximated by R(t) = 550,000e^0.22t Find and interpret the rate at which the resale value is changing. a. What is the decay rate of the resale value? -121000e^(-, 22t) b. 10 years after the initial purchase. R'(10) = -13407.18 c. 20 years after the initial purchase. R' (20) = -1485.56