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Volgvan
3 years ago
9

x}" alt="\sqrt{50x} - \sqrt{18x}" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
jeka57 [31]3 years ago
8 0

Answer:

Step-by-step explanation:

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inn [45]

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18.9

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3 years ago
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horrorfan [7]

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Is there anything I can help with though?

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A programmer plans to develop a new software system. In planning for the operating system that he will​ use, he needs to estimat
Contact [7]

Answer:  a. n= 1068

b. n= 164

Step-by-step explanation:

The formula to find the sample size :

n=p(1-p)(\dfrac{z^{*}}{E})^2

, where p=prior population proportion , z* = critical z-value and E = Margin of error.

Here , let p=proportion of computers that use a new operating system.

Given : Confidence level = 95%

i.e. z* = 1.96  [by z-table]

Margin of error : E = 3% =0.03

a. If p is unknown , then we assume p=0.5

Then, n=(0.5)(1-0.5)(\dfrac{1.96}{0.03})^2=1067.11111\approx1068

i.e. n= 1068

b. p=0.96

Then, n=(0.96)(1-0.96)(\dfrac{1.96}{0.03})^2=163.908266667\approx164

i.e. n= 164.

6 0
3 years ago
There are 43 dogwood trees currently in the park. Park workers will plant more
Digiron [165]

Answer:

100

Step-by-step explanation:

because 1 x 100 = 100

7 0
3 years ago
Jamil traveled 210 miles, which is 70% of the total
Sergio039 [100]

Answer: The correct answer is B because 0.7x=210, x=300

Step-by-step explanation:

210= 70% of the total distance to his grandfather's house, lets take that total distance for x.

So if:

210=0.7x

x=210/0.7

x=300

7 0
3 years ago
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