Triangle abc is similar to triangle def. the length of ac is 12cm. the length of bc is 18com. the length of df is 10cm. what is the length of ef?

Me n o w. i need t h i s. 10 points

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?

Iknow the square root of 2 is irrational