Chapter 13-2A 15. Find the cost of carpeting the following rectangular rooms: a) 6.5 m * 4.5 m; cost = $13.85>m2 b) 15 ft * 11 ft; cost = $30>yd2 a) 11 . 405 85 . 13 25 . 29 25 . 29 5 . 4 5 . 6 2 = ⋅ = = ⋅ = Cost m A b) 4950 30 165 165 11 15 2 = ⋅ = = ⋅ = Cost ft A
20. Find the area of each of the following shaded parts. Assume all arcs are circular with centers marked. Leave all answers in terms of π 1. The area of the entire circle is 4π and the area of each small circle is π => The area of the shaded part is 4π - 2π = 2π 2. The area of the triangle (2*2)/2 = 1 cm² and the are of semicircle is 2 π => The area of the shaded part is (1 + 2 ) cm² 3. The area of the entire circle is 4π and we can observe that the entire circle is shaded by half ( if we switch the shaded part with the part that is not shaded) => The are of shaded part is 2π 4. The area of the shaded part is 45.6cm²
Assessment 13-3A 13.A builder needs to calculate the dimensions of a regular hexagonal window. Assuming the height
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