A study shows that the mean rainfall in a certain town in the United States is 26.9 inches per year with a standard deviation of 2.3 inches per year.
What is the probability that on a certain year, the amount of rainfall falls below 20 inches?

Aline is perpendicular to another line m2= (-1/m1), where m1 is the slope of the original line and m2 is the slope of the perpendicular line. which of the following equations represents the line that passes through the point (-2,1) and is perpendicular to the line below?