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For a given interest rate, simple interest varies jointly as principal and time. If $2000 left in an account for 4 yr earned interest of $280, how much interest would be earned in 6 yr?

User Grabofus
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1 Answer

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The interest earned in 6 years would be:
$280 / 4 = $70
$70 * 6 = $420
User Rafael Aguilar
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