There are (3^2)4 ⋅ 30 bacteria in a petri dish. What is the total number of bacteria in the dish? 38
39
311
324

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

Asequence is defined recursively by the formula  f(n  +  1)  =  f(n)  +  3 . the first term of the sequence is  –4. what is the next term in the sequence? –7–117

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?