Toni's Tools is comparing machines to determine which one to purchase. The machines sell for differing prices, have differing operating costs, differing machine lives, and will be replaced when worn out. These machines should be compared using:

A. net present value only.
B. both net present value and the internal rate of return.
C. their equivalent annual costs.
D. the depreciation tax shield approach.
E. the replacement parts approach.

Suppose the government decides to issue a new savings bond that is guaranteed to double in value if you hold it for 20 years. assume you purchase a bond that costs $25. a. what is the exact rate of return you would earn if you held the bond for 20 years until it doubled in value? (do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. if you purchased the bond for $25 in 2017 at the then current interest rate of .27 percent year, how much would the bond be worth in 2027? (do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) c. in 2027, instead of cashing in the bond for its then current value, you decide to hold the bond until it doubles in face value in 2037. what annual rate of return will you earn over the last 10 years? (do not