Question 1129955
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Nora {{{highlight(cross(invest))}}} <U>invests</U> $800 that pays simple interest at the rate of 6% per annum and $1,200 
that {{{highlight(cross(pay))}}} <U>pays</U> simple interest at the rate of 7% per annum. What is her total annual interest on this two Investments?
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Her total annual interest is  0.06*800 + 0.07*1200 = 48 + 84 = 132 dollars.
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