Help me please I only have 3 questions here is the first one I did some of it already

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.

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4? r^2. write your answer in scientific notation.