What factors do all the multiples of 5 have in common​

Acircle has a circumference of 28.36 units what is the diameter of the circle

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?

Find the missing dimension! need asap! tiny square is a =3025 in ²