After 88 years, Susan's account earned $900$⁢900 in interest. If the interest rate (in decimal form) is 0.10.1, how much did Susan initially invest?Susan's Bank StatementInterest Earned $900$⁢900Rate 0.10.1Time 88 YearsPrincipal Invested ?Step 3 of 3: Finally, solve the problem by substituting in the appropriate values. (Round your answer to 2 decimal places if necessary.)

After 88 years, Amanda's account earned $1500$⁢1500 in interest. If the interest rate (in decimal form) is 0.080.08, how much did Amanda initially invest?Amanda's Bank StatementInterest Earned $1500$⁢1500Rate 0.080.08Time 88 YearsPrincipal Invested ?Step 3 of 3: Finally, solve the problem by substituting in the appropriate values. (Round your answer to 2 decimal places if necessary.)

Last year Sarah invested money in two accounts. The first account had an interest rate of 4%4% and the second account had an interest rate of 3%3%. If she invested $700$⁢700 more in the first account than the second and her total interest income was $392$⁢392, how much did she invest at each rate?

Susan deposited $4000 into an account with 4.5% interest, compounded semiannually. Assuming that no withdrawals are made, how much will she have in the account after 8 years?Do not round any intermediate computations, and round your answer to the nearest cent.

Camille invested $3,000 into an account that earned annual simple interest. She made no additional deposits or withdrawals, and after 9 years she had earned $1,755 in interest. What was the interest rate of the savings account?

Amanda invested $9000 in a fund for 5 years and was paid simple interest. The total interest that she received on the investment was $1800. As a percentage, what was the annual interest rate of her investment?