When a button is pressed, a computer program outputs a random even number greater than 0 less than 8. You press the button 4 times. Can some help me with this?

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?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

Jim had 15 minutes to do 5 laps around his school what would his time be