How do you find the number of degrees in an angle

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?

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

The amount of data left on the cell phone six gb for 81.5 gb of data is used how much data is available at the beginning of the cycle