Can someone me with this proofs for geometry?

The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319