I hope the way the problems written is understandable. 4a^3b-8a^2b^2+2ab^3 ,I need to find the GCF for this problem and like ASAP if possible please.

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

Factor and solve to find roots x squared -x - 90 =0