The line segment is rotated 270 degrees counterclockwise about the origin to form a'b'. which statement describes a'b'?

If we have point (x, y), rotating it 90 degrees counterclockwise amounts in the point being (-y, x). 180 degrees is (-x, -y) and 270 is (y, -x). Since A and B are made by a line connecting 2 points, we can get the 270 degree rotations of both points to get A'=(3, -1) and B'=(3, -5). 

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

The answer is 6 weeks