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해법
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The 원둘레 of a circle is 8𝜋 kilometers. What is the area?A 원형 has a radius of 10.5 centimeters. What is the area of the 원형? Use 3.14 for pi90 is 20% of what numberYou want to have 800,000 when you retire in 30 years. If you can earn 7% interest compounded continuously, how much would you need to deposit now into the account to reach your retirement goal?rectangular driveway has a width of 9 feet.:If the 지역 of the driveway is 432 square feet. What is the length of the driveway? Explain your reasoning.