1. Solve for the indicated variable. 1.) In x - 15.5 = 2.81y (for x) I1. Solve. 2.) Tim invests $1000 into an account in which interest is compounded continuously. If the interest rate is 2.5%, how long until Tim doubles his investment? (Round to the nearest year.) 3.) Tim plans to invest money into an account that earns 4.5% and is compounded continuously. How much should he invest so that he has $10,000 after 10 years? (Round to the nearest penny.)