Answer:
C. 3780 in²
Step-by-step explanation:
The formula of an area of the smaller rectangle:
A = xy
The formula of an area of the larger rectangle:
A' = (3x)(3y)=9(xy) = 9A
We have the area of the smaller rectangle:
A = 420 in²
Therefore the area of the larger rectangle is:
A' = 9(420) = 3780 in²
