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blagie [28]
2 years ago
10

A person standing on a moving walkway travels 60 feet in 20 seconds. What equation represents this relationship? How many feet w

ill person travel 10 seconds?
Mathematics
2 answers:
Sphinxa [80]2 years ago
7 0
30 feet in 10 seconds
Inga [223]2 years ago
6 0

Answer:

The person will travel 30 feet in 10 seconds

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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
Try to simplify 72/6+85/6
Reil [10]
72/6+ 85/6
= (72+ 85)/6
= 157/6
= (156+1)/ 6
= 156/6+ 1/6
= 26+ 1/6
= 26 1/6

The final answer is 26 1/6~
4 0
3 years ago
Read 2 more answers
DEFENDER<br>98,9%. Viruses. Germs &amp; Bacteria<br>ISOPROPYL ALCOHO​
notsponge [240]

Answer:

Step-by-step explanation:

CORN VIRUS IS A

HOAX

3 0
2 years ago
An appliance manufacturer wants to contract with a repair shop to handle authorized repairs in Indianapolis. The company has set
jeyben [28]

The best firm for the Appliance manufacturer for the repair work is Firm 2 .

In the question ,

it is given that ,

An appliance manufacturer wants to contract with a repair shop to handle authorized repairs in Indianapolis .

The acceptable range of the repair time is 50 minutes to 90 minutes.

the mean repair time for firm 1 = 74 minutes and standard deviation of 4 minutes .

the mean repair time for firm 2 = 72 minutes and standard deviation of 5.1 minutes .

the range is calculated using the formula

Range = Mean ± Standard Deviation

So , for firm 1 ,

the Range = 74 ± 4

= 74 + 4       and      74 - 4

= 78     and   70

the range for firm 2 is

= 72 ± 5.1

= 72 + 5.1      and      72 - 5.1

= 7.1        and       66.9  

The second company has a lower range and it should be preferred .

Therefore ,  The best firm for the Appliance manufacturer for the repair work is Firm 2 .

Learn more about Standard Deviation here

brainly.com/question/23611887

#SPJ1

8 0
1 year ago
<img src="https://tex.z-dn.net/?f=3x-5%2B7x%2B11" id="TexFormula1" title="3x-5+7x+11" alt="3x-5+7x+11" align="absmiddle" class="
mars1129 [50]

Answer:

10x + 6

Step-by-step explanation:

3x - 5 + 7x + 11

10x - 5 + 11

10x + 6

8 0
2 years ago
Read 2 more answers
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