what is the scale factor from figure a to figure b?

Answer:
4
Step-by-step explanation:
Top side: 10x _ = 40
Left side: 18x _ = 40
Right side: 11x _ =44
All the blanks can be answered with 4. Therefore, your answer is 4.
Hope this helps!
-AxekickNebulite
Answer:
the scale is multiplying by 4
Step-by-step explanation:
10 x 4 = 40
11 x 4 = 44
18 x 4 = 72