The number of days (X) after mailout it takes a utility company to receive payment for a customer’s bill is a normal random variable with a mean of 31 days and a standard deviation of 6 days. The latest 2.5% of bills will be received more than how many days after mailout? a) 13 b) 19 c) 25 d) 31 e) 37 f) 43 g) 49

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

We just started the introduction into circles and i have no idea how to do this.