Not sure if daughter is doing this right. Any help?

Answer:
1) A=180 ft².
2) A=144 ft².
3) A=216 ft².
4) A=54 ft².
Step-by-step explanation:
You know that 1 cm= 3 ft
[tex]Area=lengh*width[/tex]
If each side of each square measure 1 cm, you have:
1) Master bedroom:
[tex]A=(5*3ft))(4*3ft))=180ft^{2}[/tex]
2) Bedroom 2:
[tex]A=(4*3ft))(4*3ft))=144ft^{2}[/tex]
3) Kitchen and dining area:
[tex]A=(6*3ft)(4*3ft)=216ft^{2}[/tex]
4) Half bath:
[tex]A=(2*3ft)(3*3ft)=54ft^{2}[/tex]