Distance, Rate and Time - Reality Math

= 4.98 hours = 4 hours and 0.98(60 minutes) = 4 hours and 58.8 minutes = 4 hours and 58 minutes and 0.8(60 seconds) = 4 hours and 58 minutes and 48 seconds. 4:58:48. How to round is an issue here. Since the 500 miles has three significant digits, the original 4.98 hours was appropriately rounded off to 3 significant digits. ................
................