Using a calculator, you can find out that

and so that means

so your answer is
Answer:
5/28 or 0.17857142
Step-by-step explanation:
use the calculator lol
Ok so it's a proportion so this fraction is to this fraction. the smaller rectangle has sides 4 and 12. the larger one has 8 and x. so u set it up 4/12=8/x. the 4 and 8 r both the short sides so u want those on top and 12 and x r long sides so those on bottom. since that is not an answer option u can set it up as 8/4=x/12 because u still keep the variables of the same rectangle from being multipled with each other. so answer #2 is correct
The answer is 3^12. i'd explain it but i took me seven minutes to do the the problem myself. :)