What does it mean to "Give only the number and not the type of units" in math when finding the circumference of a circle?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

What is 140% of 25? because i need

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost