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3 years ago

P(x)=3x^3+64x^2+64x+27, find all the possible zeros

1 answer:

galina1969 [7]3 years ago

4 0

If you have a TI-84 graphing calculator, you should type the function in using the y= key and hit 2nd calculate to let the calculator calculate the zeroes for you.
x=-20.30, the rest are imaginary

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MissTica

Answer: 7
7 is the middle number when the number are out from least to greatest. Hope that helps!!

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2 years ago

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Suppose that at a state college, a random sample of 41 students is drawn, and each of the 41 students in the sample is asked to

ra1l [238]

Answer:

The confidence interval for 90% confidence would be narrower than the 95% confidence

Step-by-step explanation:

From the question we are told that

The sample size is n = 41

For a 95% confidence the level of significance is $\alpha = [100 - 95]\% = 0.05$ and

the critical value of $\frac{\alpha }{2}$ is $Z_{\frac{\alpha }{2} } =Z_{\frac{0.05 }{2} }= 1.96$

For a 90% confidence the level of significance is $\alpha = [100 - 90]\% = 0.10$ and

the critical value of $\frac{\alpha }{2}$ is $Z_{\frac{\alpha }{2} } =Z_{\frac{0.10 }{2} }= 1.645$

So we see with decreasing confidence level the critical value decrease

Now the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{s}{\sqrt{n} }$

given that other values are constant and only $Z_{\frac{\alpha }{2} }$ is varying we have that

$E\ \ \alpha \ \ Z_{\frac{\alpha }{2} }$

Hence for reducing confidence level the margin of error will be reducing

The confidence interval is mathematically represented as

$\= x - E < \mu < \= x + E$

Now looking at the above formula and information that we have deduced so far we can infer that as the confidence level reduces , the critical value reduces, the margin of error reduces and the confidence interval becomes narrower

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2 years ago

3 people can build a shed in 8 hours how long would it take 5 people

harkovskaia [24]

Answer:

3howers

Step-by-step explanation:

Step-by-step exaplanation

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3 years ago

Does 5 go into 100 equally

andreev551 [17]

Yes, 5 goes into 100 exactly 20 times because 5 multiplied by 20 is 100

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2 years ago

Which shows a reflection over the x-axis?

a_sh-v [17]

Answer:

Probably a bit late but its A the first one ;P

Step-by-step explanation:

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