Asurvey asked eight students about weekly reading hours and whether they play musical instruments. the table shows the results of the survey.

Find the value of the cosine for angle a

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)