Janiya found that her playlist will play for 3.8 x 10^2 seconds, 6.3 x 10^5minutes, 1.05 x 10^4hours, 4.39814 x 10^2 days. Which answer uses the most appropriate units?
1. 3.8 x 10^2 seconds
2. 6.3 x 10^5minutes
3. 1.05 x 10^4hours
4. 4.39814 x 10^2 days
1 answer
4. 4.39814 x 10^2 days