No, you do not have to line up the decimals.
Answer:

Step-by-step explanation:
we know that
To find out the difference In the fuel tank of the two cars, subtract the fuel tank capacity of the compact car from the fuel tank capacity of the luxury sedan
so

I think the answer is 1.2
Answer:
hey buddy im gona help you!
Step-by-step explanation:
From what I can tell, this can't be simplified, because there are no factors of 42 that are perfect squares. I would leave it as the square root of 42.