What is the slope of a ski run that rises 5 feet for every horizontal change of 20 feet

What is the base of 1/9 to the power of 2

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?