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Betty needs to understand the interest rate for her savings account in order to calculate how much the account will earn in interest. she visits a customer service representative at her new bank to learn how to calculate the interest. he gives her an expression to find the interest rate, r, in her savings account. it is

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jcharr

r = (18/15)1/3 - 1 = (6/5)1/3 - 1 = (2/5) - 1 = - 3/5 = -0.6.

above is the question but are you sure the question is correct? shouldn't r = (18000/15000)^1/3 - 1? please check.

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