An actor invests some money at 9%, and $38,000 more than four times the amount at 11%. The total annual interest earned from the investment is $79,440. How much did he invest at each amount?
a) $160,000 at 9%, $308,000 at 11%
b) $180,000 at 9%, $340,000 at 11%
c) $200,000 at 9%, $380,000 at 11%
d) $220,000 at 9%, $420,000 at 11%
