Paul spent 35 hours this winter skiing. his girlfriend nancy spent 23 hours skiing. how many more hours did paul spend skiing than nancy

Consider the graph of the exponential function y=3(2)×

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?

Me. i can't figure out this question. give an explanation too. .