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.
Learn about the essential duties of a CNA. A certified nursing assistant, or CNA, works under the supervision of nurses to deliver high quality care to patients. The job requires long hours and many responsibilities, but caring for patients on a daily basis provides some of the greatest rewards any profession could offer.