Eat breakfast and arrive to your testing area early.
Absolutely don't try to cram unless you certainly know you can absorb and retain the information that you're trying to cram in at the last minute. You will only be overwhelmed.
Answer:
fix hgt you GH GT of by he ever GT GT fit yrry
First, convert watts to kilowatts.
500w/1000= .5 kW per hour
.5*4 hours= 2kwh*365 days= 730 kWh
The answer is 730 kwh per year