PLEASE HELP ME!!
I NEED BOTH PARTS

Is a positive integer raised to a negative power always positive

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

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.