The division ➗ ÷ sign will make the expression correct if you correct the question!
Well I would say A because it went from 8 to 38 which is plus ten.
Divide $4.20 by 2 to get how much $ a pound then multiply by 5 MAKE SURE TO DO IT TWICE in order to have the right answer
So-called simplifying, really means, "rationalizing the denominator", which is another way of saying, "getting rid of that pesky radical in the bottom"