Question

How many seconds are in an exactly 40-hour work week?

Answer 1

7 days = 1 week 60 seconds = 1 minute.
40 hr 60 min 60 sec = 144,000 s. 
The answer is 144,000 seconds hopes this helps :)

Answer 2

60 minutes = 1 hour   24 hours = 1 day   7 days = 1 week   60 second = 1 minute   40 hours 60 minutes 60 seconds = 144,000 seconds. I hope this helped!