Hassan built a fence around a square yard. it took 500 feet of lumber to build the fence. the fence is 5 feet tall. what is the area of the yard inside the fence?

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

Express -5 2/5 as an improper fraction.

The experience c-0.25c can be used to find the cost of an item on sale for 25% off which expression beloit equivalent to c-0.25c