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The digit 5 is in the hundreds position, so the number would be rounded up. So 35000 is the answer.
To find the perimeter of a rectangle, you need to add up the lengths of all its sides. In this case, the area of the rectangle is given as 60 sq ft, and one of its sides is 6 ft. To find the other side, you divide the area by the given side length: 60 sq ft ÷ 6 ft = 10 ft. Now, you can calculate the perimeter by adding up all the sides: 6 ft + 10 ft + 6 ft + 10 ft = 32 ft.
Up to 149.61 gallons.
An acre is an area, and can be found from the shape and dimensions. If it is rectangular only two are required. Here, 4 are given, so it is probably an irregular quadrilateral. Some angles are needed. Plot these lengths out on graph paper (you will immediately see why angles are needed) and count up the little squares inside the area.
1 cu. yd of cured concrete is about 3600lbs. 1 cu. ft of cured concrete is about 134 lbs. (rounded up) 4 ft x 4 ft x 5/6 ft = 13 1/3 cu. ft 13 1/3 cu. ft = 1787lbs (rounded up)