The drawings below were made during a laboratory exercise in which a microscope was used to view slides of preserved Protozoa . The microscope had a 10x eyepiece and two different objectives?

The magnification of the microscope depends on the objectives used. To calculate the total magnification, multiply the magnification of the eyepiece (10x) by the magnification of the objective lens being used. If you had two objectives, each with magnifications of, for example, 40x and 100x, the total magnification would be 400x and 1000x respectively when using the 10x eyepiece.