You live in St. Louis. You have a computer made by a company near Los Angeles. You want to call people at the company about a problem you are having with your computer. They go to work at 9:00 A.M. What is the earliest St. Louis time you can call them?

1 Answer
Jan 17, 2016

11:00 A.M.

Explanation:

St. Louis is in Central Standard Time (CST). It is 6 hours behind Greenwich Mean Time (GMT).

Los Angeles in in Pacific Standard Time (PST), which is 8 hours behind GMT, or 2 hours behind CST.

When it is 9:00 A.M. PST, that is two hours behind the CST time. Thus, the CST time is 11:00 A.M.