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Translate the problem into an equation:
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人気の例
twice the 差 of a number and 2 is equal to 8The radius of a 円 is 3 feet. What is the 円's area?What is the volume of a sphere with a 半径 of 6.3 cm, rounded to the nearest tenth of a cubic centimeter?The 面積 of a rectangle is 3,420 square feet. The width of the rectangle is 9 feet. What is the perimeter of the rectangle?The 直径 of a circle is 16 ft. Find its area to the nearest whole number.