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Standardized Test Practice EXAMPLE 3 Use the formula for the area of a rectangle, A = lw, with l = 18 inches and w = 11 inches. SOLUTION

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Standardized Test Practice EXAMPLE 3 The area is 198 square inches, so the total cost is $.25(198) = $49.50. ANSWER The correct answer is B. A B C D Write area formula. Substitute 18 for l and 11 for w. Simplify. A = lw = 18(11) = 198

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GUIDED PRACTICE for Example 3 2. WHAT IF? A gardener determines the cost of planting daffodil bulbs to be $2.40 per square foot. How much will it cost to plant daffodil bulbs in a rectangular garden that is 12 feet long and 5 feet wide? A B C D $40.80 $60 $81.60 $144 Gardening ANSWER The correct answer is D. A B C D

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