Equivalent fraction for four this is 8/10
Answer:
The sample size is 183.
Step-by-step explanation:
Given:
σ = $1050, ppulatin standard deviation
99% confidence interval
Accuracy = +/- $200
The accuracy is given by
z*(σ/√n)
where
z* = 2.576 for 99% confidence level (from tables)
n = sample size
Therefore
2.576(1050/√n) = 200
√n = (2.576*1050)/200 = 13.524
n = 182.9
<em>The sample size is 183</em>
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Solving for x...
Times the
, both the numerator and denominator, by 8 to get the denominator to 16.
Times the
, both the numerator and denominator, by 4 to get the denominator to 16.
Then rewrite the problem,
now that the denominators are all the same, you can solve...
subtract the
from both sides
you should get
Multiply both sides by 16 (it'll cancel both the 16 out making it go away)
8x = 11
divide each side by 8 to have the x alone
<u>8x</u> = <u>11
</u> 8 8
<u>
</u> You should end with x =
or 1.375<u>
</u>
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