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Brrunno [24]
3 years ago
12

What is the best mechanical advantage that you can obtain for any door that you simply push open?

Mathematics
1 answer:
Komok [63]3 years ago
8 0

Answer:

  2

Step-by-step explanation:

The best mechanical advantage you can get is obtained by pushing the door at its edge. If the door's center of mass is halfway from the hinge to the edge, then the advantage you get (in terms of force reduction) is ...

  1/(1/2) = 2

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Jasmine bought 1.3 pounds of ham and 0.8 pounds of cheese from the deli and paid $11.28. She went back the following week and bo
LuckyWell [14K]
Let

x
be the price for a pound of ham
y the price for a pound of cheese

<span>1.3x +0.8y = 11.28  ....(1)
1.5x +1.2y = 14.76  ....(2)

Lets multiply (1) by -1.2
Lets multiply (2) by 0.8

-1.56x -0.96y = -13.536 .....(3)
</span> 1.2x + 0.96y = 11.808 .....(4)


If we add (3) and (4)

-0.36x = -1.728 ............> x = 4.8

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3 years ago
You are standing on top of a 50 foot cliff over looking a pond. The angle of depression from you to the pond is 47 degrees. How
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Answer: 97

Step-by-step explanation: hope this is right.

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3 years ago
What is the slope of this line?<br><br> A. -1/2<br> B. 1/2<br> C. -2<br> D. 2
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We can find the slope of this line by using the slope formula:

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A university is interested in promoting graduates of its honors program by establishing that the mean GPA of these graduates exc
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Step-by-step explanation:

Population Mean (u) = 3.50

Sample (n)= 36

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Population standard deviation (s)= 0.40

Test statistics:

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(Alternate hypothesis) H1: u> 3.5 (Population mean is greater than 3.5)

Z= \frac{x-u}{\frac{s}{\sqrt{n} } }= \frac{3.60-3.50}{\frac{0.4}{\sqrt{36} } }= \frac{0.10}{0.067}= 1.5

critical value= Z0.05= 1.645 (From Z table)

Since, Z value is less than critical Z value that is Z<1.645

We cannot reject null hypothesis

So, we decide to reject that the mean GPA of graduates exceeds 3.50

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