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Tutor profile: Weining C.

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Weining C.
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Subject:Python Programming

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Question:

There is a list A of length 9, and you want to store the value of the middle element in a variable named "m". Would this statement work? m = A[len(A)/2] If not, explain why there would be an error and provide a concise way to correctly declare the value of m. Assume we are using Python 3

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Weining C.

The statement would not work because in Python 3 , the "/" operation between an odd integer and 2 will result in a floating point value. Therefore, 9/2 will result in 4.5. the "//" operator may be used instead

Subject:Pre-Algebra

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Question:

Percentages are an extremely common mathematical expression that we use in everyday life. How can percentages be expressed as fractions? Explain what the numerator and denominator represent.

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Weining C.

Percents can be expressed as fractions with the numerator being the percent, and the denominator as 100. For example, 23% could be expressed as $$\frac{23}{100}$$. The numerator represents occurrences while the denominator represents total cases. In the example, the fraction represent 23 occurrences of a certain thing out of 100 cases

Subject:Basic Math

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Question:

Subtraction is the opposite of addition. This fact may be useful in checking your work when you finish a problem. For example, if want to check your addition problem of 571 + 607 after you arrive at the answer of 1178, can you try 1178 - 607 to see if you get 571. What can you use for a division problem?

Inactive
Weining C.

Multiplication. It may be useful after a long division problem to try multiplying your result with the divisor. (Quotient x Divisor = Dividend)

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