How Many 10-Digit Telephone Numbers (Area Code + Number)are Possible

question 9

Multiple Choice

How many 10-digit telephone numbers (area code + number) are possible if the first digit cannot be zero, the first three digits cannot be 800 or 900, and the number must end in 0000?

• A)900,000
• B)898,000
• C)654,642
• D)899,000

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Definitions:

Capillaries

Tiny blood vessels connecting arterioles and venules, facilitating the exchange of water, oxygen, carbon dioxide, and other nutrients and waste substances between blood and tissues.

Abdominal Aorta

The main blood vessel supplying blood to the abdomen, pelvis, and legs.

Diaphragm

A large, dome-shaped muscle located at the base of the lungs that plays a key role in breathing by contracting and expanding the thoracic cavity.

Backflow

The flow of a fluid in a direction opposite to its usual or intended direction, often causing contamination or malfunction in plumbing or in bodily systems.