Question 1161203

Mardi received an inheritance of $60,000. She invested part at 9% and deposited the remainder in tax-free bonds at 8%. Her total annual income from the investments was $5100.  Find the amount invested at 9%.
<pre>Interest RATE earned on the 2 investments: {{{matrix(1,5, "5,100"/"60,000", "=", ".085,", or, "8.5%")}}}
Since .085, or 8.5% falls MIDWAY between 8% and 9%, then amount invested in 9% and also 8% would be: {{{highlight_green(matrix(1,5, 1/2, of, "$60,000", "=", highlight("$30,000")))}}}