Katie earned $480 in 8 years on an investment at a 6% annual simple interest rate. how much was katie’s investment? $1000 $2500 $4500 $9000

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743

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