Just finished this for another student.
Length = 9
First calculate the area of the floor, this would be 30*50 = 1500 square feet
Now multiply the area by the cost for each square foot, so 1500*0.5 = $750
Answer:
Step-by-step explanation:
Given
length of three sides are
according to Euclidean geometry



also



therefore value of 
If x is an integer then x can be 