Which of the following investments will earn the greatest amount of interest? a. $2,400 invested for 3 years at 5.0% interest b. $1,950 invested for 4 years at 4.0% interest c. $1,600 invested for 8 years at 3.0% interest d. $1,740 invested for 2 years at 8.0% interest

first we will count the amount of interest for:

A. $2,400 - 3 years at 5.0% : first we need to count what is one percent of $2,400, and we do that by dividing 100, and that gives us $24, to count our interest in one year we need to multiply $24 with 5.0 and that gives us $120 per year, so to calculate the final amount we need to multiply $120 with the amount of years given and that is 3, so the final amount of interest that we will earn at $2,400 - 3 years at 5.0% is $360;

B. $1,950 invested for 4 years at 4.0%, we repeat the same process, we count one percent of $1950 by dividing it with 100 and that gives us $19,5, then we multiply those $19,5 with the interest rate which is 4.0 and that gives us $78 per year, then we multiply that amount with 4 (number of years), and in 4 years we will earn $312

C. $1,600 invested for 8 years at 3.0% interest : again we count one percent of $1600 which is $16, then multiply that with the interest which is 3.0 and that gives us earnings of $48 per year, then we multiply that amount with 8 (number of years), so in 8 years we will earn $384

D. $1,740 invested for 2 years at 8.0% interest : again we count one percent of $1,740 and that is $17,4, then we count how much we will earn in 1 year, and we do that if we multiply 17,4 with the interest which is 8.0, that gives us $139.2 per year, and for 2 years that gives us the total earnings of $278.4

So the correct answer is C) $1,600 invested for 8 years at 3.0% interest, which will earn us $384.