Write an Equivalent Sentence for the Statement

question 201

Multiple Choice

Write an equivalent sentence for the statement.
-An number n is divisible by 3 if and only if the sum of the digits of n is divisible by 3. (Hint: Use The fact that (p → q) ∧ (q → p) is equivalent to p ↔ q.)

• A) The sum of the digits of n is divisible by 3 or the number n is divisible by 3.
• B) If a number n is divisible by 3 then the sum of the digits of n is divisible by 3, and if the sum of the digits of n is divisible by 3 then the number n is divisible by 3.
• C) If a number n is divisible by 3 then the sum of the digits of n is divisible by 3, or if the sum of the digits of n is divisible by 3 then the number n is divisible by 3.
• D) A number n is divisible by 3 and the sum of the digits of n is divisible by 3.

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Definitions:

Action Potential

A temporary reversal of the electrical polarity of the cell membrane that travels along a neuron, enabling the transmission of nerve impulses.

Neurotransmitters

Chemical substances in the nervous system that transmit signals from one neuron to another across synapses.

Terminal Buttons

The small knobs at the end of an axon that release chemicals known as neurotransmitters, which transmit signals to other neurons.

Myelin Sheath

A fatty layer that surrounds the axons of some neurons, providing insulation and improving the speed and efficiency of neural signal transmission.