How long is one year in seconds?

To determine the length of one year in seconds, it is essential to start with the basic units of time. A year is typically considered to be 365 days. To convert this into seconds, the following calculations are performed:

1. Start by converting days to hours: 1 day = 24 hours, therefore 365 days = 365 × 24 = 8,760 hours.

2. Next, convert hours to minutes: 1 hour = 60 minutes, so 8,760 hours = 8,760 × 60 = 525,600 minutes.

3. Finally, convert minutes to seconds: 1 minute = 60 seconds, thus 525,600 minutes = 525,600 × 60 = 31,536,000 seconds.

When expressed in scientific notation, 31,536,000 seconds can be rewritten as approximately 3.155 x 10^7 seconds.

This calculation confirms that one year is approximately 3.155 x 10^7 seconds, supporting the accuracy of the provided choice.

In the context of the other options, they represent minute discrepancies due to miscalculations in the conversion factors or rounding errors, making them incorrect for the