What is the product of 3/5 and 5

Answer this question, only if you know the answer. 30 points and brainliest!

Find the center of the circle that can be circumscribed about efg with e(4,4) f(4,2) g(8,2)

Calculate the mean value (expected value) of the following discrete variable x (10 points): x = 0, 1, 2, 3, 4, 5, 6 p(x) = 0.2, 0.2, 0.15, 0.15, 0.15, 0.1, 0.05