Which of the following formulas would find the surface area of a right cylinder where h is the height, r is the radius, la is the lateral area, and ba is the base area?

a. 2pi^2+pi r h
b. ba+la
c. ba+ 2 pi r ^2
d. pi r^2+ pi r h
e. la+ (pi r^ 2)

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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step-by-step explanation:

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