3 years ago

Find all zeros of the polynomial function. g(x) = x^4 + 2x^3 + 7x^2 + 2x - 8

Mathematics

1 answer:

tester [92]3 years ago

6 0

Answer:

x≈−

1.32047132, 0.82496696

Step-by-step explanation:

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suter [353]

Answer:

0.0066

Step-by-step explanation:

Given that:

Mean $\mu$ = 75

Variance $\sigma^2 =961$

The standard deviation $\sigma = \sqrt{961} = 31$

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$\mu = \mu_{\overline x} = 75$

$\sigma _{\overline x} = \dfrac{\sigma }{\sqrt{n}}$

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$\sigma _{\overline x} = \dfrac{31 }{10}}$

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$P(\overline x > 83.7) = 1 -P\bigg ( \dfrac{\overline x - \mu_{\overline x} }{\sigma _{\overline x}} < \dfrac{83.7 - 76}{3.1} \bigg)$

$P(\overline x > 83.7) = 1 -P\bigg ( Z< \dfrac{7.7}{3.1} \bigg)$

$P(\overline x > 83.7) = 1 -P ( Z< 2.48)$

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