A principal of 250 OR is deposited in an account that pays 0.064 interest compounded yearly. Account balance function in response of time (years)is f(x) = P(1+r)* P: initial value r: interest compounded yearly x: time in year a. Find the account balance after 5 years. b. By graphing show if the Account balance function is increasing or decreasng. c. After how many years the account balance will be 12000 OR.

You have 500 dollars in your bank account. Suppose your money is compounded every month at a rate of 0.4 percent per month. (a) How much do you have after t years? y(t) = = (b) How much do you have after 80 months? y(80) = (function of t)

A bank features a savings account that has an annual percentage rate of r = 5% with interest compounded quarterly. Laura deposits $10,500 into the account. P(1 + )". The account balance can be modeled by the exponential formula S(t) = where S is the future value, P is the present value, r is the annual percentage rate written as a decimal, n is the number of times each year that the interest is compounded, andt is the time in years. (A) What values should be used for P, r, and n? Р— r = n = (B) How much money will Laura have in the account in 9 years? Answer = $

Find the time required for an investment of 5000 dollars to grow to 8000 dollars at an interest rate of 6.8 percent per year, compounded daily. _______________years.