Denali borrows $2400 for two months at 7% simple interest. Find the amount of interest paid and the amount that Denali must pay back at the end of two months. If necessary, round to two decimal places.

b) [5 marks] Give an expression for the amount of interest you will have earned in the 15 months.

Calculate the amount of interest paid provided that the principal amount is with an interest rate of % compounded annually for years.

Find the amount of interest due on a $10000, on 8% rate for 90 days (assume 360 days in a year) at the time of maturity?