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3. The number of cars in the United States during year t can by represented by the function c(t). The number of people in the United States during year t can be represented by p(t). Write a new function that represents the number of cars per person in the year t. 4. The price of an item over a certain amount of months t can be represented by The sales tax in California can be represented by the function s(t) = 0.0825. Use function notation to write a new function that represents the purchase price of the item over those months