Find each rate and unit rate?
-420 miles in 7 hours
- 360 customers in 30 days
-40 meters in 16 seconds
-$7.96 for 5 pounds

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

The verbal translation for the difference of m and 7 increased by 15

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?