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# Tutor profile: Rachel W.

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Rachel W.
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## Questions

### Subject:Geometry

TutorMe
Question:

If a circle has the diameter of 8, what is the circumference?

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Rachel W.

The answer is 25.13 To find this, we use the equation: C=2πr For consistency sake, always use 3.141 for π. The radius of a circle is half its diameter; in this case, since the diameter is 8, the radius will be 4. We then plug those numbers into the equation. so that the equation now looks like a simple multiplication problem: C= 2 x 3.14 x 4

### Subject:Pre-Algebra

TutorMe
Question:

A rectangle is 9 meters long and 4 meters wide. What is its area?

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Rachel W.

The area is 36 meters squared. To find this, we use the formula: A=lw (Area=length X width). We multiply the two numbers, nine and four, and find that our answer is 36 meters squared.

### Subject:Algebra

TutorMe
Question:

5(-3x - 2) - (x - 3) = -4(4x + 5) + 13

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Rachel W.

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