Where do i put parentheses to make a statement true

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

If 20% of a number is 35, what is 50% of that number?

Describe what moves you could use to create the transformation of the original image shown at right