Which function is increasing at the highest rate?

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

Find x to the nearest hundredth place

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?