Francesca tried to evaluate an expression. Here is her work: 3(5)2–18÷3

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3(25)–18÷3 Step 1

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75–18÷3 Step 2

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57÷3 Step 3

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19 Step 4

Is Francesca's work correct?

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π