Example 3 13. CONSTRUCTION A contractor is replacing a trapezoidal window on the front of a house. 5 ft a. Find the area of the window. b. If the glass for the window costs $7 per square foot, about how much should the contractor expect to pay to replace the window? 3ft 5 ft 14. HOME IMPROVEMENT Iker is building an island for his kitchen in the shape of a trapezoid as shown. a. What is the area of the top surface of the island? b. The island will be made of granite which costs $65 per square foot. Approximately how much will the granite cost? 4.5 ft Example 7 6 ft

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