A movable section of stage has the shape of an isosceles right triangle. You need to apply 2 coats of paint to all but the bottom. The paint covers approximately 80 square feet per quart. How many quarts of paint do you need to buy?

21.4 i did it already for s1

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$4

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$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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