(Solved): The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value. ...

The cost of electricity varies widely throughout the United States; $$\$0.120/\mathrm{kWh}$$ is a typical value. At this unit price, calculate the cost of the following. (a) Leaving a 40.0-W porch light on for 2 weeks while you are on vacation. $$\$$$ (b) Making a piece of dark toast in $$3.00\min$$ with a 960-W toaster. (Give your answer to at least three decimal places.) 4 (c) Drying a load of clothes in $$40.0\min$$ in a 5,100 W dryer. (Give your answer to at least one decimal place.) $$?$$