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I need the process of this question. Thank you!

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.

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122

Since we have computer algebra systems that can solve polynomial division problems for us, why is it necessary to learn how to do these things by hand?