Identify whether if it's true or false

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

Write the expression as a single natural logarithm. 2 in a - 4 in y

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?