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Pedro opened a savings account and deposited 500.00 as principal. The account earns 12% interest, compounded annually. What is the balance after 3 years?The sum of a number times 7 and 23 is at most-25if the quotient of two times a number and three is increased by 8, the result is no more than 28Two airplanes leave an airport at the same time and travel in opposite directions. One plane travels 65 km/h faster than the other. If the two planes are 14175 kilometers apart after 9 hours, what is the rate of each plane?If the denominator of 4/7 is increased by a number and the numerator is doubled, the result is 1. Find the number.