The oven needs more energy to work well. It is plugged into a 220 V outlet.

1. a. What two forms of energy does the oven convert the electricity into? Which is useful and which is wasteful?
2. b. If the oven is 2500 W, how much current does it draw?
3. c. In order to bake cookies, the oven is on for 45 minutes. How much energy does the oven use to make the cookies?
4. c. If the oven is 80% efficient, how much energy is useful and how much is wasteful?