1) Capital of 6,000 is continuously interest-bearing for 8 years with a fixed annual interest rate of 8%. Calculate the amount that will have been collected at the end of the eighth year

2) What is the active interest rate of the annual nominal 6%, if the interest is paid a) every four months, b) every month, c) every week, d) continuously.

3) Capital in the first 3 years bears interest at a rate of 3%. Find for how many extra years it has to raise interest rates at 2%, in order to lead to a final capital that will be 20.65% higher than the original.