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

Identify future directions for prevention and promotion in mental health.

Understand the concepts and mechanisms of allopatric and sympatric speciation.

Identify and explain different isolation mechanisms that prevent species interbreeding.

Describe how geographical features and biomes contribute to speciation.

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Definitions:

Soil-Testing Laboratory

A specialized facility that analyzes soil samples to determine nutrient content, composition, and other characteristics important for agriculture and environmental science.

Inorganic Mineral Particles

Solid, naturally occurring substances that are not derived from living organisms, commonly found in soils and rocks, essential for various environmental and biological processes.

Organic Material

Matter that comes from living organisms or is composed of compounds originally synthesized by living organisms, often rich in carbon.

Micronutrient

An essential element that is required in trace amounts for normal growth. Compare with macronutrient.