i need help with those

A man has a simple discount note for $6,100, at an ordinary bank discount rate of 8.84%, for 40 days. What is the effective interost rate? Round fo the nearest tenth of a percont. The ellective interest rate is B5. (Round to the nearest tenth of a percont as neodod.) A home-decorating company is determining the amount of fabric required for a customer's window treatments. A single window requires 1254 yards and a double Window requires 18158 yards of fabric. If there are two single windows and one double window, how much fabric is fequired? yards