What is 0.326 in a different form

Let event a = you roll an even number on the first cube.let event b = you roll a 6 on the second cube.are the events independent or dependent? why?

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.