Step-by-step explanation:
I think the answer is B why don't you use a calculator?
Answer:

Step-by-step explanation:
We have a certain expression and are asked to find its equivalent with the answers provided :

Remove the parenthesis around 3m^5 :

Do the exponent rule for outside and inside exponent parenthesis :


Apply addition exponent rule :

Add :

Apply the addition rule for -12 + 5 :

Apply negative exponent rule for m^-7 :

Multiply the fractions :


If I did my math correctly I believe your answer will be C. :)
They each paint a part of the poster that is 1.333 or 1 1/3 feet long. Hope this helps:)