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JulsSmile [24]
3 years ago
15

Simplify the expression

i}{2i}" alt="\frac{-5+i}{2i}" align="absmiddle" class="latex-formula">
Mathematics
2 answers:
lbvjy [14]3 years ago
5 0

Multiply by the conjugate and simplify.

1/2 + 5i/2

Kryger [21]3 years ago
4 0

\text{We know}\ i=\sqrt{-1}\to i^2=-1

\dfrac{-5+i}{2i}=\dfrac{-5+i}{2i}\cdot\dfrac{i}{i}=\dfrac{-5i+i^2}{2i^2}=\dfrac{-5i+(-1)}{2(-1)}=\dfrac{-5i-1}{-2}\\\\=\dfrac{-5i}{-2}+\dfrac{-1}{-2}=\boxed{\dfrac{1}{2}+\dfrac{5}{2}i}

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siniylev [52]

Answer:

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Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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If we want to be 90% confident that the sample mean beer temperature is within 0.1 degrees of the true mean temperature, how many beers must we sample?

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