Mathematics, 29.08.2019 07:30 tabocampos1414

Sam opened a money-market account that pays 2% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?

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Sam opened a money-market account that pays 2% simple interest. he started the account with $7,000 a...