Here are some questions you’ll be asked after you finish watching the videos. Please read through these before watching the videos.

A candle has been burning at a constant rate of change of 2.25 inches per hour. The candle has been burning for 4 hours and is 4.5 inches tall. What was the length of the candle before it was lit?
A swimming pool that is only partially full has 10,800 gallons of water. Water is added to the swimming pool 10:00 AM at a constant rate of 24 gallons per minute.
How much water is in the pool 75 minutes after water started being added?
When the pool is full, it holds 19,200 gallons of water. How long will it take to fill the pool to capacity?