Question 7 3 pts Adae invested $10,000, a portion earning a simple interest rate of 5.4% per year and the rest earning a rate of 4.8% per year. After one year the total interest earned on these investments was $519.24. How much money did he invest at 5.4% per year? If necessary, round your answer to the nearest whole dollar. Type in a numerical amount. You don't need to include the "$" symbol, and you don't need to write a sentence. Question 8 3 pts DELL C