Answer:
a) 484 square feet of ground will be needed to cover with gravel.
b) 14 feet is the length of one of the walls in his room
Step-by-step explanation:
Area of the square = ![A=(Side)^2](https://tex.z-dn.net/?f=A%3D%28Side%29%5E2)
a) Length of the side of the square driveway ,s= 22 feet
Area of ground covered by gravel be A.
Area enclosed by square driveway is equal to area of ground covered by gravel.
![A = s^2](https://tex.z-dn.net/?f=A%20%3D%20s%5E2)
Area of square driveway = A= ![s^2=(22 ft)^2=484 ft^2](https://tex.z-dn.net/?f=s%5E2%3D%2822%20ft%29%5E2%3D484%20ft%5E2)
484 square feet of ground will be needed to cover with gravel.
b) Area of the square carpet ,A= ![196 ft^2](https://tex.z-dn.net/?f=196%20ft%5E2)
Area of the square carpet is equal to the area square bedroom
Length of the square carpet = s
Length of the carpet = Length of the room of Micheal's bedroom
![A = s^2](https://tex.z-dn.net/?f=A%20%3D%20s%5E2)
![196 ft^2=s^2](https://tex.z-dn.net/?f=196%20ft%5E2%3Ds%5E2)
s = ±14 ft
Ignoring the negative value , we get :
s = 14 ft
14 feet is the length of one of the walls in his room.