Your dad has a 1965 mustang which he bought for $5,000 twenty years ago. it has appreciated at a rate of 15% per year. how much is it worth now?

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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