The magnification of an object is calculated by multiplying the objective magnification by the eyepiece magnification.

When using the Federal Emergency Management Agency's Urban Search and Rescue system (FEMA US&R), what does the mark above the X indicate?

A. Hazards B. Search unit C. Time of completion D. Victims and condition

Drugs used for ophthalmological procedures are similar to those for systemic use but must be:

a. less concentrated b. less viscoelastic c. more diluted d. more pure