Please help with this question.

The heaviest 16% of all men in weight weigh more than how many pounds ?

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?

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0