A roofer shouldn't charge by the hour he should charge by the square. In a square their is 100 sq.ft and they usually charge $300 per square. roofer shouldn't charge by the hour he should charge by the square. In a square their is 100 sq.ft and they usually charge $300 per square.
In the United States, the certified nursing assistant (CNA) typically works in a nursing home or hospital, and performs everyday living tasks for the elderly, chronically sick, or rehabilitation patients who cannot care for themselves.
A brief CNA job description is provided here to help understand what CNAs do. CNAs are nursing assistants who have taken required training and have passed a competency exam. These certified nurse assistants are valuable members of the health care team. They provide patient care and perform various care-giving tasks under the supervision of a nurse or doctor.