What is the result of converting 99 inches into feet

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

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?