Rose had a bottle of water that was 4/5 full. during the day she drank 2/3 of the bottle. what fraction of the bottle did she drink.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

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.