On a blueprint with a scale of 1 cm = 4ft, the length of the wall is 9 cm. if the scale of the blueprint were 1 cm = 3 ft, what would be the length of the wall? plz show work and explain your work.

a. 12 cm
b. 13 cm
c. 15 cm
d. 18 cm

I'd say it's A because you multiply the 4 ft by 3 ft and you'll get 12 ft.

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