If the amount invested at 3.5% is A, then the amount at 5% must be 10440 - A
Interest = A x 3.5% + (10440 - A) x 5% = 483
1.5% x A = 39
A = 2600 invested at 3.5%
and 10440 - 2600 = 7840 at 5%
If any more than 2600 is invested at 3.5% the interest will fall below 483
What is the most that she can invest at 3.5% and still be guaranteed at least $483.00 in interest per year? Round your answer to the nearest cent and include units.
