) 250 is invested in a savings account. The nominal rate of interest convertible monthly for the first 3 months is 18% and the nominal rate of interest convertible quarterly for the next 9 months is 20%. How much is in the account at the end of the year?

d) You have deposited $1000 in a savings account today, and the interest rate is 5% per year. What is the future value of this cash flow 3 years from today

e) The force of interest is given by: t=0.04+0.002t, &0t<100.015t-0.08, &10t<120.07 t 12

Find an expression for the accumulation factor from 0 to t.