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# Tutor profile: Maya S.

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Maya S.
University of Michigan Student - Bioengineering and Biology Knowledge
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## Questions

### Subject:Basic Math

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Question:

Find the solution for the following: (a) -4 + 8 = ? (b) 1/2 + 2/5 = ? (c) -2 + 2 = ?

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Maya S.

(a) -4 + 8 = 4 To find this, we could use a number line. We begin at -4 and move left towards zero. -4, -3, -2, -1, 0. At this point we have moved, 4 spots. We need to add 4 more which gives us a final answer of 4. (b) 1/2 + 2/5 = 9/10 To find this, we need to make these unlike fractions with the same denominators. By doing this, we need to find the least common multiple (LCM). To do this, we identify what values are multiples of 2 and 5. We see that they are the opposite values. We multiple (1/2)(5/5) and (2/5)(2/2) which gives us 5/10 + 4/10 = 9/10.

### Subject:Basic Chemistry

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Question:

What information can be found on an element in the periodic table? Find the information for the element Hydrogen.

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Maya S.

We can find: - Atomic number (top left value) - Name (bottom center) [depends on periodic table] - Symbol (center) - Atomic mass (below the symbol) For the element hydrogen, - Atomic number is 1 - Name is hydrogen - Symbol is H - Atomic mass is 1.008

### Subject:Calculus

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Question:

Find the derivative of x^2.

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Maya S.

The derivative of x^2 is 2x. To answer this question, we must apply the derivative rule. d/dx [x^k] = k * (x)^ (k-1) so, d/dx [x^2] = 2*(x)^(2-1) d/dx [x^2] = 2 *(x)^1 d/dx [x^2] = 2 *(x)

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