Final answer:
The cost of running a 1500-W hair dryer for 30 minutes is $0.09 when the cost of electricity is $0.12 per kWh.
Step-by-step explanation:
To calculate the cost of running a 1500-W hair dryer for 30 minutes, we need to first calculate the total energy used by the hair dryer. The power of the hair dryer is given as 1500 W, and the time it is used for is 30 minutes, which is equivalent to 0.5 hours. Therefore, the energy used by the hair dryer is:
Energy = Power x Time = 1500 W x 0.5 hours = 750 Wh = 0.75 kWh
Now, to calculate the cost, we can multiply the energy used by the cost of electricity per kilowatt-hour. The cost of electricity is given as $0.12 per kWh. Therefore, the cost of running the hair dryer for 30 minutes would be:
Cost = Energy x Cost per kWh = 0.75 kWh x $0.12/kWh = $0.09
So, the statement that $0.09 is the cost of running a 1500-W hair dryer for 30 minutes when the cost of electricity is $0.12 per kWh is True.