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A savings account had an initial deposit of $50 with $20 deposited each month after...

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A savings account had an initial deposit of $50 with $20 deposited each month after it was opened. The total amount in the account can be found by the function A(t) = 20t+50, where t is the time inmonths after the account was opened. If the total amount in the account is $390, find the length of time the account has been open.After months, the total amount in the account is $390.(Simplify your answer.)

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