Which of the following expresses 393,500 in scientific notation?

Which statement about the annual percentage rate (apr) is not true?

Using elimination, what is -4x+2y=-12 4x+8y=-24

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick