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1142. A rectangular section of wall, 6 m wide and 9 m long, is to be covered with tiles. The tile is square with a side of 15 cm. How much hay will be needed?
Solution:
6 m = 600 cm
9 m = 900 cm
900:15=60
600:15=40
60×40=2400
Wall 2400
1143. The dimensions of a right parallelogram are cm, cm and 3 cm. Find the volume of the parallelogram and find which segment has the larger area.
Solution:
2 5/6 • 2 8/9 • 3 = 442/18
442/18 = 24 5/9
Answer: 2 8/9, 24 5/9, 3
1144. The side of a cube is 5 times the side of another cube. How many small cubes will fit with the big cube? 125
1145. What must be the integers a and b for the inequality to be true? a) ab > 0, b) ab < 0, c) ab = 0. Answer: a) a > 0, b > 0, or a < 0, b < 0, b) a < 0, b > 0, or a > 0, b < 0, c) a = 0, or b = 0.
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