Which expression is equivalent to x^-6

Mathematics

2 answers:

natali 33 [55]3 years ago

6 0

Answer:

1/x^6

Step-by-step explanation:

natima [27]3 years ago

6 0

Answer:

$x^-3$ × $x^-3$

Step-by-step explanation:

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perimeter of each semicircle: (1/2)π*4=2π
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Hello There! ^_^

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Can you help me solve this radical equation √y-10 = y-2 the sqrt sign is only over the y-10

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You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on con

Assoli18 [71]

Question:

You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on constructing a confidence interval; however, you are not sure how many citizens should be included in the sample. If you want your sample estimate to be within 5 years of the actual mean with a confidence level of 97% , how many citizens should be included in your sample? Assume that the standard deviation of the ages of all the citizens in this community is 18 years.

Answer:

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Step-by-step explanation:

Given:

Standard deviation = 18

Sample estimate = 5

Confidence level = 97%

Required:

Find sample size, n.

First find the Z value. Using zscore table

Z-value at a confidence level of 97% = 2.17

To find the sample size, use the formula below: