Solve the Problem. -How Many Four-Digit Numbers Can Be Formed Using the Digits

question 151

Multiple Choice

Solve the problem.
-How many four-digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, if repetitions Of digits are allowed?

• A) 8999
• B) 9000
• C) 10,000
• D) 256

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Definitions:

Focus Knobs

Controls on a microscope that adjust the clarity and sharpness of the specimen being viewed by moving the lenses closer or farther from the specimen.

Iris Diaphragm

A mechanical device, typically part of a camera or microscope, that controls the amount of light passing through a lens or onto a specimen.

Field Diameter

The diameter of the field of view seen through the microscope, typically measured in millimeters or micrometers.

Magnification

The process of enlarging the appearance of an object as viewed through an optical instrument like a microscope or telescope.