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fgiga [73]
2 years ago
12

Winston found $3.75 for in change on the beach with

Mathematics
1 answer:
Citrus2011 [14]2 years ago
5 0

Answer:

Winston can find $1.125 dollars every 1 hour.

Step-by-step explanation:

I got this by dividing 3.75 by 3 1/3.

3.75 ÷ 3 1/3 = 1.125

Hope this helps! :)

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An unconfined compression test was performed to determine the average strength of concrete cylinders (in psi). It is believed th
Ronch [10]

Answer:

Explained below.

Step-by-step explanation:

(1)

The confidence level is, 91%.

Compute the value of α as follows:

\text{Confidence level}\% =(100-\alpha \%)\\\\91% = 100-\alpha \%\\\\\alpha \%=100-91\%\\\\\alpha \%=9\%\\\\\alpha =0.09

(2)

As the population standard deviation is provided, i.e. <em>σ</em> = 256 psi, the <em>z</em> value would be appropriate.

The <em>z</em> value for α = 0.09 is,

<em>z</em> = 1.69

(3)

Compute the 91% confidence interval as follows:

CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}

     =3000\pm 1.69\cdot\frac{256}{\sqrt{70}}\\\\=3000\pm 51.71\\\\=(2942.29, 3057.71)

(4)

The 91% confidence interval for population mean implies that there is a 0.91 probability that the true value of the mean is included in the interval, (2942.29, 3057.71) psi.

8 0
2 years ago
A)4(3х+4)<br> B)- 60(-7 х - 3)<br> With solution please <br> Urgent
lbvjy [14]

happy with solution rate this

6 0
3 years ago
Read 2 more answers
Use the triangles below to find the<br> trigonometric ratios.
anzhelika [568]

Hi I did my working on paper. You can see it in the photo.

6 0
1 year ago
what is the circumference of a frying pan that has a radius of 14 centimeters. Use 22/7 for <img src="https://tex.z-dn.net/?f=%2
DerKrebs [107]
We know, C = 2πr

So, c = 2 * 22/7 * 14

c = 2 * 22 * 2

c = 88 cm

In short, Your Answer would be: 88 cm

Hope this helps!
8 0
2 years ago
Find the area.<br> help pls
Neko [114]

Answer:

30 square feet

Step-by-step explanation:

The area of a trapezoid is equal to (a+b)/2 * h
In this case, the value of a is 5, b is 10, and h is 4. You can substitute those numbers into the formula and get the answer of 30.

4 0
2 years ago
Read 2 more answers
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