Crypto Miner

Consider a 120 Watt computer graphics card is plugged into a 220 volt circuit. The GPU is used to mine a cryptocurrency overnight for 720 minutes. If the energy company charges 10 cents per KW∙hr, how much did it cost to run the miner overnight?

Hint
The electrical power is billed in $$kW\cdot hr$$ , so first determine the energy usage:
$$$120W\cdot 720min\cdot \frac{1hr}{60min}=1440\:W\cdot hr$$$
Hint 2
To calculate the cost, simply multiply the energy usage by the rate.
The electrical power is billed in $$kW\cdot hr$$ , so first determine the energy usage:
$$$120W\cdot 720min\cdot \frac{1hr}{60min}=1440W\cdot hr=1.44kW\cdot hr$$$
To calculate the cost, we can simply multiply the energy usage by the rate:
$$$1.44kW\cdot hr\times10\frac{cents}{kW\cdot hr}=14.4\:cents$$$
It would cost 14.4 cents or $0.14 to run the mining rig overnight.
$0.14