They all go together in this question, please help.

Kelly bought a new car for $20,000. The car depreciates at a rate of 10% per year. Part A What is the decay factor for the value of the car? BIU X X 2 15px AvLV BVBV Characters used: 0 / 15000 Part B Write an equation to model the car's value. BIUXX 2 15px BVBV Characters used: 0 / 15000 Part C Use your equation to determine the value of the car six years after Kelly purchased it. BIU X X 2 15px VBV