Which of the following is an odd function?

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Step-by-step explanation:

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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 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13