If a person's total comes to $32.45 and they give you $45.50 but you accidentally type in $40.32 what change would you get them back

In the 30-60-90 triangle below side s has a length of and side r has a length

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.

Sum is 17 and their difference is 3