Ineed this. i have no idea on what to do

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?

Using the information in the customer order, determine the length and width of the garden. enter the dimensions. length: feet width: feet

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?