Problema Solution
an actor invests some money at 6% and $43000 more than four times the amount at 9%. The total annual interest earned from the investment is $40410. How much de he invest at each amount?
Answer provided by our tutors
let 'x' represent the amount of money invested at 6%, then '4x+43000' represents the amount invested at 9%
interest = principal * rate * time
we take time to be equal to 1
40410 = 0.06x + 0.09(4x+43000)
solving for 'x' we have x=87000
4*87000 + 43000 = 391000
the actor invested $87,000 at 6% and $391,000 at 9%