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3 years ago

Please help me understand how to do this

Mathematics

2 answers:

MrRa [10]3 years ago

6 0

Whenever you have something to the negative power, it will result in a fraction. So, if you have seven to the second power, it would be 49, and then you turn that into a fraction, which would be 1/49.

CaHeK987 [17]3 years ago

4 0

Answer:

Step-by-step explanation:

Since the exponent 2 is negative, you will need to make it positive first. In order to do so, you can put 7^2 in the denominator. (If the original question was 1/7^-2 you could put 7^2 in the numerator to cancel out the negative). By doing this, the negative is removed and you are able to answer the question as 1/7^2 . The answer would then be D, since 7^2 is 49, but you put the number in the denominator because of the negative exponent.

I hope this makes sense!

(also: I am not exactly positive as to what standard form would be with just one number and an exponent, so I answered this as I have learned in my math classes.)

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3 years ago

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olya-2409 [2.1K]

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3 years ago

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3 years ago

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daser333 [38]

Answer:

a. He will have to read half an article per night

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Explanation:

Part a:

We are given that:

number of articles to read = 4 articles

number of nights = 8 nights

To get the number of articles that he should read per night, we will simply divide the the number of articles by the number of nights

Therefore:

number of articles to read per night = $\frac{4}{8}=\frac{1}{2}$ articles per night

Part b:

Now, we know that he will read half an article each night from a total of 4 articles

To get the fraction of the reading assignment read each night, we will divide the number of articles read each night by the total number of assignments

Therefore:

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Hope this helps :)

5 0

3 years ago