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# Tutor profile: Serina W.

Inactive
Serina W.
Electrical/Systems Engineer for Department of Defense (DoD) and Department of the Navy (DoN); Tutor for 5 years.
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## Questions

### Subject:Pre-Calculus

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Question:

How do you simplify an expression?

Inactive
Serina W.

The first step to simplifying an expression, is to reduce common terms. For example, 12x/3x will simplify to 4x.

### Subject:Calculus

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Question:

How would you define what a function is?

Inactive
Serina W.

A function represents an equation for the area underneath the curve on a graph.

### Subject:Algebra

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Question:

What is the meaning of an exponential value and how is it represented?

Inactive
Serina W.

An exponential value expresses how many times a number is multiplied by itself. This is represented by showing the amount of times the number is being multiplied as a small script number, at the top right of the number that's being multiplied. For example, "5 exponential 2" means that 5 is being multiplied by itself twice (5 x 5 = 25). Or "5 squared."

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