Bill Rich signed a 180-day note for $1,250. He repaid the loan when due with interest at an annual rate of 12 % using a banker's year.

Kelly Bullock borrowed$4,800 for 6 months and paid $264 interest. What rate of interest did she pay?

A sum of $1000 was invested for 4 years, and the interest was compounded semiannually. If this sum amounted to$1435.77 in the given time, what was the interest rate?

Compute the future value of $100 at an 8 percent interest rate 5, 10, and 15 years into the future. What would the future value be over these time horizons if the interest rate were 5 percent?

At bank $A, \$ 600$ is invested with an interest rate of $5 \%$ compounded annually. At bank $B, \$ 500$ is invested with an interest rate of $6 \%$ compounded quarterly. Which account will have a larger balance after 10 years? 20 years?

A loan of $\$ 10,000$ was repaid at the end of $6$ months. What amount (principal and interest) was repaid, if a $6.5 \%$ annual rate of interest was charged?

At bank A, $600 is invested with an interest rate of 5% compounded annually. At bank B,$500 is invested with an interest rate of 6% compounded quarterly. Which account will have a larger balance after 10 years? 20 years

To make CDs look more attractive than they really are, some banks advertise that their rates are higher than their competitors’ rates; however, the fine print says that the rate is a simple interest rate. If a person deposits $10,000 at 10% per year simple interest, what compound interest rate would yield the same amount of money in 3 years?

A company issued bonds with a $100,000 face value, a 5-year term, a stated rate of 6%, and a market rate of 7%. Interest is paid annually. What is the amount of interest the bondholders will receive at the end of the year?

Determine the cost of the points and the new interest rate for each loan amount and interest rate. Assume each point costs 1% of the loan amount. $550,000, original APR 4.75%, 1 point with a 0.3% discount.

Suppose that $10,000 is invested at continuous rate r and grows to$17,160 in 9 years. Find the interest rate r.

Find the simple interest paid to the nearest cent for each loan amount, interest rate, and time. $1,000, 7%, 2 years

The monthly payment on a $300,000 30 year mortgage at 6% annual interest rate is$1798.65. What is the interest payment for the first month?

Suppose an amount P is invested at an interest rate r and A is the amount after t years.

(a) Write an expression for $A$ if the interest is compounded $n$ times per year.

(b) Write an expression for $A$ if the interest is compounded continuously.

Find the simple interest paid to the nearest cent for each loan amount, interest rate, and time. $725, 6.25%, 1 year