Eric's teacher says that the ph of hair,skin and nails falls on the acid side of the ph scale. The ph of hair, skin and nails is _______.

Most states require cosmetologists to take a two-part exam to become licensed or certified.  The first part is a written multiple-choice exam covering subjects like skin structure, nail structure, haircutting, facials and sanitation. The second part is a hands-on exam where a cosmetology candidate needs to demonstrate knowledge and skill in like haircutting, color application and manicure.