If you travel 156miles at 80mph but have a 30min layover how long will it take to reach the destination?

The basic formula to memorize is:

Distance = rate x time

In this problem you want to find time, so you can rearrange this to get:

Time = Distance/Rate

You have 156 miles at 80 miles per hour, so:

Time = 156 miles/80 MPH.

Then add the 30 minutes layover. What do you get for a final answer?