When reconstituting dry powders of parenteral drugs, it is important to know the

Which of the following is true about exact numbers and inexact numbers?

A) Exact numbers are imprecise, and inexact numbers are precise. B) Exact numbers are those measured by machines, and inexact numbers are measured by humans. C) Exact numbers have been confirmed by repeated measurements, and inexact numbers are from a single measurement. D) Exact numbers result from counting things, and inexact numbers result from measuring things.

Which of the following are drugs derived from animal substances?

A. Potassium chloride and mineral oil B. Digitoxin and quinine C. Ibuprofen and aspirin D. Cephalosporin and penicillin E. Thyroid hormone and insulin