21. The roof of a house has the shape of a pyramid with euare base o I5 S TH. M. Gordon wants to cover this Toof with plyv What will be-the cost of this renovation? 22. A factory makes cement blocks in the shape of truncated base pyramids, as indicated in the figure on the right. The company ordering the blocks wants to paint the lateral faces and the upper base of these blocks. How many cans of paint will be required if each can of paint covers 40 m² and the company has ordered 1000 cement blocks? square The ty

Three pieces, each in the shape of a sector, are cut from the rectangular sheet of steel shown. How many Square meters are wasted after the three pieces are cut? Round the answer to the nearest tenth meter.

Tom Morrow wants to buy some fertilizer for his yard. The lot size is 140 ft by 160 ft. The outside measurements of his house are 80 ft by 35 ft. The driveway measures 30 ft by 20 ft. All shapes are rectangular. aWhat is the square footage of his yard that needs to be fertilized? bIf each bag of fertilizer covers 5000ft2, how many bags should Tom buy? cIf the fertilizer costs 18 per bag, what is his total cost?

Find the area of a triangular lot with two sides of lengths 24 yards and 18 yards and an included angle of 80.