Least common denominator of y^4/y^2-6y+9 and 3/y^2+y-12

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

How do you write something in scientific notation?

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.