The science club went on a two-day field trip. the first day the members paid $30 for transportation plus $12 per ticket to the planetarium. the second day they paid $90 for transportation plus $9 per ticket to the geology museum. write an expression to represent the total cost in dollars for two days for the n members of the club.

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.