Alex is building a circular base for a fountain the radius of the circle is 4 ft what is the area of the base

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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the answer is a. 72. but i cant answer with less than 20 characters so here's some random text talking about it.