Represent the following expressions as a power of the number a (a≠0): (a^2·a)^3 ÷ a^2

Im so bad at fractions they are not my best math thing to work on

Reading tests are compared for two students. sara got 98, 100, 65, 78, 98, 46, 100, 100, 45, and 50 on her reading test. lee got 97, 67, 89, 99, 100, 45, 79, 89, 58, and 67 on his reading test.

Find the measurement of angle b in the following triangle