d. Write an algebraic expression to represent the absolute difference between varying values of the depth of the hole (D), and the ideal depth of the hole (22 cm). This is sometimes called the margin of error. ID-22 Preview e. Write an inequality to represent values of the margin of error that are less than or equal to 3.5 cm. In other words, write an inequality using an absolute value to represent the values that D may attain. ID-221