What number produces a rational number when added to 0.5

What describes horizontal cross section of the right rectangle 6m 8m 5m

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

The rectangle shown has a perimeter of 108 cm and the given area. its length is 6 more than five times its width. write and solve a system of equations to find the dimensions of the rectangle.