Question 211303
She must invest 8200 dollars so that she can earn 7 percent on the total investment. 8200 at 6 percent 492 dollars. 8200*.06=492. 8200 at 8 percent is 656 dollars. If you add 656 with 492 you get the total amount that is earned in interest. This is 1148 dollars which is 7 percent of 16400. 16400*.07=1148.