Anne is shopping for notebooks. Which is a better buy: 3 for $3.29 or 2 for $2.89?

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?