Which of the following is not a special power if the senate? a. all impeachment trials must be held in the senate. b. all bills for raising must begin in the senate. c. all treaties with foreign must me approved by the senate d. appoitments to the supreme court must be apptoved in the senate.

You are considering the purchase of one of two machines used in your manufacturing plant. machine 1 has a life of two years, costs $20,000 initially, and then $4,000 per year in maintenance costs. machine 2 costs $25,000 initially, has a life of three years, and requires $3,500 in annual maintenance costs. either machine must be replaced at the end of its life with an equivalent machine. using eac which is the better machine for the firm