#7) Learn By Doing Inc., required 45 minutes to make the first unit of a widget in an assembly process. Determine the time required for 16th unit if the learning curve percentage is 90%. a. 36.5 minutes b. 20.9 minutes c. 42.1 minutes d. 29.5 minutes #8) Arbitrage Investments LLC invested $20,000 and $30,0000 respectively on two investments that yielded a combined rate of return of 10% (compounded annually) over five years. If the rate return on the first investment of $20,000 was 12%, what is the rate of return the company obtained on the second investment of $30,000.? a. 8.00% b. 8.27% c. 8.59% d. 10.00%