Final answer:
The earliest you should call from New York to contact a supplier in Seattle when they open at 8 AM is 11 AM New York time, due to the 3-hour time difference.
Step-by-step explanation:
If your office is in New York and you need to contact a supplier in Seattle, the earliest New York time you should call to place an order, assuming that the supplier opens at 8 AM Seattle time, is 11 AM New York time. This is because Seattle is in the Pacific Time Zone, which is 3 hours behind the Eastern Time Zone, where New York is located. When it is 8 AM in Seattle, it is already 11 AM in New York.