Suppose that 1000$ is deposited in a savings account at an annual rate of 5%. Guess the amount in the account at the end of 1 year if interest is compounded (1) quartely, (2) monthly, (3) daily, (4) hourly. Use the comound interest formula to compute the amounts at the end of 1 year to the nearest cent. Discuss the accuracy of your initial guesses.
Explore and Discuss that if 1000$ were deposited in savings account at an annual interest rate of 5%, then the amount at the end of 1 year would be less than 1,051.28$, even if interest were compounded every mimute or every second. The limiting value, approximately 1,051.271$, is said to be the amount in the account if interest were cmpounded continuously.
If a pricipal, P, is interested at an annual rate, r, and compounded continuously, of then the amount in the account at the end of t years is given by
A= Pert Continuous compound interest formula.
Where the constant e≈ 2.71828 is the base of the exponential function.
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