Noelle has a deck that extends 4 ft on all sides of an 18 by 10 rectangular swimming pool. what is the area deck?

To calculate the area of the deck, we must first find the total area of the pool and the deck, and then subtract the area of the pool.

The area of the pool is 18 * 10 = 180 square feet.

The area of the deck can be calculated by finding the area of a rectangle with dimensions of 18 + 8 + 8 = 34 feet by 10 + 8 + 8 = 26 feet: 34 * 26 = 884 square feet.

Therefore, the area of the deck is 884 - 180 = 704 square feet.