You purchase a new car for $23,200. the value of the car decreases by 22% each year.
part a: write a function that can be used to find the car’s value after t years.
part b: to the nearest dollar, estimate the value of the car after 6 years.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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