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Pedro opened a savings account 8 years ago. The account earns 7% interest, compounded monthly. If the current balance is 800.00, how much did he deposit initially?28 percent of what number is 840the sum of the consecutive number is 35.Devaughn's age is two times Sydney's age. The sum of their ages is 78 . What is Sydney's age?the ages of john and mary are 54. four years ago, john was twice as old as mary. find the present age of each