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notsponge [240]
3 years ago
5

Find the principle fourth root of -81, checking your answer by raising to the 4th power. If there are "no real roots," then type

: NONE
Mathematics
1 answer:
kondaur [170]3 years ago
4 0

Answer:

None

Step-by-step explanation:

There are actually 2 answers, 3 and -3. Although if you put it in a calculator, it would show "math error" or undefined. That's because the index is even (4) and the radicand is negative (-81)

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Find lcm and hcf of 168 and 126​
Nuetrik [128]

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Step-by-step explanation:

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3 years ago
The owner of a fish market has an assistant who has determined that the weights of catfish are normally​ distributed, with mean
LiRa [457]

Answer:

P(X\geq 3.4)=0.0228

Step-by-step explanation:

Given the mean is 3.2, standard deviation is 0.8 and the sample size is 64.

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#First determine the z-value:

z=\frac{\bar X -\mu}{\sigma/\sqrt{n}}\\\\=\frac{3.4-3.2}{0.8/\sqrt{64}}\\\\=2.000

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Hence, the probability of obtaining a sample mean this large or​ larger is 0.0228

8 0
3 years ago
NEED HELP NOW! SOLVE THE INEQUALITY: -r/3 ≤ 6
larisa [96]

Answer:

r\geq -18

Step-by-step explanation:

\frac{-r}{3} \leq 6\\\rule{150}{0.5}\\(\frac{-r}{3})*3\leq 6*3\\\\-r \leq 18\\\\\frac{-r \leq 18}{-1}\\\\\boxed{ r\geq -18}

Hope this helps!

5 0
3 years ago
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