Strength tests on four batches of concrete show them to fail at 81, 78, 86, and 95 ksi. The standard deviation of this sample is most nearly:

Mr. smith, a 57-year-old patient, presents at a health fair asking questions about the age-appropriate health maintenance and promotion considerations he should be concerned about. he stated that he only goes to his physician when he is sick and the last time he saw his physician was 2 years ago when he had a sinus infection. a. what further assessment does the nurse need to make before designing a teaching plan? b. what topics does the nurse need to include for mr. smith based on current medical recommendations? c. design a teaching plan that covers the topics.

Which of the following pieces of equipment is necessary for the prone position? a. stirrups b. footboard c. chest rolls d. bean bag

Ahealthy 26-year-old woman sustained a significant crush injury to her right upper extremity while on the job at a local construction site. she was brought to the emergency department and subsequently underwent pinning and reconstructive surgery and received perioperative broad-spectrum antibiotics. her blood pressure remained normal throughout her hospital course. on the second hospital day, a medical consultant noted a marked increase in her creatinine, from 0.8 to 1.9 mg/dl. her urine output dropped to 20 ml/h. serum creatine kinase was ordered and reported as 3400 units/l. questions what are the primary causes of this patient’s acute kidney injury? how should her kidney injury be categorized (as prerenal, intrarenal, or postrenal)? how should she be treated?