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The diâmetro of a circle is 18 ft. Find its area in terms of pipi.A zero coupon bond with a face value of 28,000 matures in 20 years. What should the bond be sold for now if its rate of return is to be 2.659% compounded annually? . Round to the nearest dollar.A person invests 3500 dollars in a bank. The bank pays 4.5% interest compounded monthly. To the nearest tenth of a year, how long must the person leave the money in the bank until it reaches 6900 dollars?Dana's age 9 years ago is 3 times Maia's age 4 years later. If Dana is 33 now, how old is Maia's age now?What is the interest on Rs. 1600 for one year at the rate 3-1/2