Aswimming pool and deck are built in a rectangle with length 40 ft and width 18 ft. if the pool itself is 320 square feet, what is the area of the deck itself?
a) 320 square feet
b) 400 square feet
c) 480 square feet
d) 560 square feet

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle. he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field