It is required to convert 4 years into hours.
It is given that 1 non-leap year = 8760 hours and 1 leap year = 8784 hours.
It is also given that one out of every 4 years is a leap year.
Hence, it follows that:
![4\text{ years }=3\text{ non-leap years }+1\text{ leap year}](https://img.qammunity.org/2023/formulas/mathematics/college/5sg3db5h04vy8g8k6asvzjdmrecxd3v50n.png)
Substitute the given conversion rates:
The answer is 4 years = 35064 hours.