△ABC is a right isosceles triangle, the centers of two arcs are the midpoint of

AB

and point C. Find the difference of the area of the "moon" and the triangle, if the length of hypotenuse is 12in.

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is