Question

how many seconds are in a week?

Answer 1

604800

Answer 2

Show the process, and this method will always work. Find the relationships or equalities that may be helpful.

1 week = 7 days
1 day = 24 hours
1 hour = 60 minutes
1 minute = 60 seconds

Starting with the unit of 1 week, set up a fraction using each equality that cancels one unit and replaces it with something better

\[1 week * \frac{7 days}{1 week}*\frac{24 hours}{1 day}*\frac{60min}{1 hour}*\frac{60sec}{1 min}\]