I need help bad I don’t understand it I’m struggling bad I need help

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15

Jack brought 12 pet monkeys. if each monkey cost $45.99, how much money did he spend in all?