What is the ratio of TV to WX

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

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?

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x