Answer:
C, 23 square feet
Step-by-step explanation:
we can start by finding the area of Stephan's playroom
this is modeled by
11*11=121
Next we can find the area of Carmen's playroom
we know his playroom is 1ft longer and wider
so the dimensions of his playroom is 12 by 12
the area can be modeled by
12*12=144
now we just need to subtract
144-121=23
