How do you find the angle between two vectors?

What is the value of f(x) = 2.2 for f(-2)?

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

1: 4 if the wew 35 surfboards at the beach how many were short boards?