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3. A car was purchased for $25,000. Research shows that the car has an average yearly depreciation rate of 18.5%, a) Determine if this models a linear or exponential function. Explain why. b) Create a function that will determine the value, V) of the car t years after purchase U (t) = 25000 (1-. 185)* c) What is the value of the car after 5 years? 4. A recording studio charges musicians an initial fee of $50 to record an album. Studio time costs an additional $75 per hour. a) Determine if this models a linear or exponential function. Explain why. b) Write function that represents the total cost of recording an album as a function of studio time (in hours)