Blake's investment in her savings account matured to $4,472.93 at the end of 85 days. If the account was earning simple interest at a rate of 5.30% p.a., answer the following. a. What was Blake's initial investment? Round to the nearest cent b. How much interest did Blake earn? Round to the nearest cent Debt payments of $1,100 and $2,800 are due in five months and eight months, respectively. What single payment is required to settle both debts in one month? Assume a simple interest rate of 4.20% p.a. and use one month from now as the focal date. Round to the nearest cent Nicole currently owes $11,000 to a friend who is charging her interest of 1.80% p.m. She is required to settle the loan with two equal payments, one today and the other in two months. Calculate the size of the payments using two months as the focal date. Round to the nearest cent