10 hours and 30 minutes.
8 hours
10:30-5:30 is 7 hours
400 minutes.
Thirty thousand, twelve and five ten-thousandths.
Twelve and thirty-seven ten-thousandths.
Twelve and thirty-seven ten-thousandths.
twelve and thirty-five ten thousandths
thirty thousand and twelve, and five ten-thousandths
7.712
Thirty of them.
Ten hours thirty minutes
TEN HOURS AND THIRTY EIGHT MINUTES (10 hours 38 minutes)