I have to show my work. Can anybody help me thank you.

Hi, I'm sorry but I don't know what the box method is but the answer for question 15 is 14472 and the answer for question 16 is 17510.

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.

hope it

a is the right answer