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Scilla [17]
3 years ago
14

Help pleasseeeeeeeee

Mathematics
1 answer:
Fed [463]3 years ago
5 0

Answer:

-1

Step-by-step explanation:

I know that i^4 = 1

i^10 = i^4 * i^4 * i^2

     = 1 * 1 * i^2

We know that i^2 = -1

    =1 *1 *-1

    = -1

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Using the simple random sample of weights of women from a data​ set, we obtain these sample​ statistics: nequals45 and x overbar
Tomtit [17]

Answer: (141.1, 156.48)

Step-by-step explanation:

Given sample statistics : n=45

\overline{x}=148.79\text{ lb}

\sigma=31.37\text{ lb}

a) We know that the best point estimate of the population mean is the sample mean.

Therefore, the best point estimate of the mean weight of all women = \mu=148.79\text{ lb}

b) The confidence interval for the population mean is given by :-

\mu\ \pm E, where E is the margin of error.

Formula for Margin of error :-

z_{\alpha/2}\times\dfrac{\sigma}{\sqrt{n}}

Given : Significance level : \alpha=1-0.90=0.1

Critical value : z_{\alpha/2}=z_{0.05}=\pm1.645

Margin of error : E=1.645\times\dfrac{31.37}{\sqrt{45}}\approx 7.69

Now, the 90% confidence interval for the population mean will be :-

148.79\ \pm\ 7.69 =(148.79-7.69\ ,\ 148.79+7.69)=(141.1,\ 156.48)

Hence, the 90​% confidence interval estimate of the mean weight of all women= (141.1, 156.48)

3 0
3 years ago
Consider the function f (x) = x2.
klio [65]

Answer: The graph is shifted 2 units to the right.

Step-by-step explanation:

Given a function f(x), we know that one transformation rule is:

If f(x-k) then the function is shifted "k" units to the right.

 Therefore, for the function f(x)=x^{2}, when we subtract 2 from the input, then we get the function g(x) in the form:

 g(x)=(x-2)^{2}

We can conclude that subtracting 2 from the input of the function f(x)=x^{2}, then the graph is shifted 2 units to the right.

5 0
3 years ago
Read 2 more answers
Solve to inequality 5/6v < 8/5
Anna35 [415]
\dfrac{5}{6}v \ \textless \  \dfrac{8}{5}\ \ \ |multiply\ both\ sides\ by\ \dfrac{6}{5}\\\\\dfrac{6}{5}\cdot\dfrac{5}{6}v \ \textless \  \dfrac{6}{5}\cdot\dfrac{8}{5}\\\\v \ \textless \  \dfrac{48}{25}\to v\in\left(-\infty;\ \dfrac{48}{25}\right)
4 0
3 years ago
What is y=x-4 2x+y=5
ahrayia [7]
If you would like to solve y = x - 4 and 2 * x + y = 5, you can do this using the following steps:

y = x - 4
2 * x + y = 5
_____________
2 * x + (x - 4) = 5
2 * x + x = 5 + 4
3 * x = 9     /3
x = 9 / 3 
x = 3

y = x - 4 = 3 - 4 = -1

The correct result would be x = 3 and y = -1.
7 0
3 years ago
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Your dad is putting a new circular swimming pool in the backyard that has the radius of 8 ft. If he wants to put bricks AROUND t
stira [4]

Answer:

2r*3.14= c

Step-by-step explanation:

2*8=16

16* 3.14=50.24

He will need 51 feet of brick

3 0
3 years ago
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