In an effort to save the environment, stacey makes a classroom presentation about how many gallons of water a dripping faucet can waste. if 15 gallons are wasted in three days, and 30 gallons are wasted in six days, what is the rate of change of gallons wasted per day?

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.