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Genrish500 [490]
2 years ago
15

Please answer part b and part C!

Mathematics
2 answers:
max2010maxim [7]2 years ago
6 0
Hey! Please do not use that link to download the answers. It’s fake and it’s a scam, they commented that on mine to so don’t do it
lys-0071 [83]2 years ago
4 0
Don’t use that link it’s an honest scam
You might be interested in
A
netineya [11]

1.25 percent of 3000=37.5

37.5 times 4=150

3000-150=2850

5 0
2 years ago
Qual o resultado de<br> (-3+4-2)elevado a 5
m_a_m_a [10]
-3 is the answer.... i think
3 0
3 years ago
Can someone please helpp me in mathhhh i am failingggggggggggggg
butalik [34]
<span>1.
Given that a study uses statistical methods to conclude that there is an association between the weights of cars and the amounts of fuel consumption.

This means that the study established a correlation between </span><span>the weights of cars and the amounts of fuel consumption.

But, </span>a<span><span> correlation between variables, however, does not automatically mean that the change in one variable is the cause of the change in the values of the other variable.
</span>
Therefore, the conclusion by the study that adding weight to a car is what makes it consume more fuel is wrong because The conclusion is based on a correlation that implies causality.


</span><span>2.
Given that a recent government agency found that 89% of people that owned a car were above the poverty line, while only 8% of people that did not own a car were above the poverty line. They concluded that owning a car kept people out of poverty and started a program to give cars to people below the poverty line.

We can see that the problem with the study is that the government agency automatically assumed that the correlation between the variables implies causality.


</span><span>3.
Given that a government agency produced a study in which they randomly chose 100 students just beginning college to determine what percentage of students who begin college graduate with a degree. After four years they identified that 23 had dropped out of college, 45 had graduated, and 20 were still pursuing their degree.

Notice that the number of final sample is less than the number of the initial sample.

Therefore, What is wrong with this poll is that some of the sample data are missing.
</span>

<span>4.
Given that a shampoo company recently paid a consulting firm to produce a study to determine if using their product resulted in cleaner hair than other brands.

As can be noticed the study is based on the self interest of the shampoo company.

Therefore, the thing wrong with this study is that it is a self-interest study.


</span><span>5.
Given that a survey was recently quoted to support the news that the number of trees in the United States is increasing. Upon further research it was found that the survey was fully funded by a logging company.

As can be seen, the logging company funded the survey in other to justify their activities

Therefore, the problem with this survey is that it is a self-interest study.
</span>

<span>6.
Given that a radio station sent a letter in the mail to 1000 randomly chosen residents within its broadcast area. The letter contained one dollar and a survey. The survey asked recipients to track their radio habits over a week. The survey was to be filled out and sent back in to the radio station.

Here, the major problem with this study is the problem of non-response.
There is every possibility that not all the mails will be delivered either way.

Therefore, a problem with the study is that a nonresponse occurred.


</span><span>7.
Given that the fire department in California decided to take a poll to see if residents would pay a monthly fee for their services. They polled 22 people in the state and concluded that residents were not willing to pay a monthly fee.

As can be seen, a sample of 22 people is too small to refrect the views of the population of a state.

Therefore, what is wrong with this poll is that the conclusion is based on a small sample.


</span><span>8.
Given that a campaign manager created a survey to see if the candidate could be elected into office. The survey randomly chose 1,832 voters and asked them whom they would vote for. Of those surveyed, 953 people responded that they would vote for the candidate. Because there are 87,403 voters in the area, the results mean that 45,466 people would vote for this candidate.

As can be seen, the surveyor concluded that a  similar proportion of voters responded that they would vote for the candidate, would vote for his candidate. This is a precise number and surveys do not usually result in a presice number but in a proportion with an allowed margin of error.

Therefore, a problem with the study is that the result is a precise number.
</span>

<span>9.
Given that a hospital did a ten-year study on patients who used its services. One thousand patients were randomly selected and followed over a period of ten years to determine the average number of visits per year. By the end of the ten year period some of the patients had left the area.

As can be seen, because some of the patients had left the area, the problem with the poll is that some of the sample data are missing.


</span><span>10.
Given that a city council had a proposal for a new traffic light at an intersection that had a recent accident. The council decided to take a poll of 284 randomly selected residents and asked if they would support the construction. Of those polled, 219 stated that they would support the new traffic light and 45 said they would not.

</span><span>Notice that the number of final sample is less than the number of the initial sample. (i.e. 219 + 45 = 264 which is less than 284)

Therefore, </span><span><span><span>the problem with the study</span> is that some of the sample data are missing.</span></span>
4 0
3 years ago
Read 2 more answers
A wheel of radius 10 inches is rotating 20°/sec. What is the linear speed in in/sec and the angular speed in RPM? (Round your an
Assoli18 [71]

9514 1404 393

Answer:

  a)  3.491 in/s

  b)  3.333 RPM

  c)  0.349 rad/s

Step-by-step explanation:

We know the arc length for a given radius and angle is ...

  s = rθ

so the linear speed along the arc is ...

  s' = rθ' = (10 in)(20π/180 rad/s) = 10π/9 in/s ≈ 3.491 in/s

__

The rotation rate of 20°/s is an angular velocity of ...

  (20°/s)(60s/min)(1 rev/360°) = 3.333 RPM

__

In the first part, we found the angular speed to be π/9 radians/sec. That's about ...

  π/9 rad/s ≈ 0.349 rad/s

3 0
2 years ago
I need help on this. The portrait studio can buy photographs on canvas. The small canvas photograph print is $20 and the large c
Whitepunk [10]
<h3>Answer:</h3>
  • 6 large prints
  • 12 small prints
<h3>Step-by-step explanation:</h3>

<em>Numerical Reasoning</em>

Consider a set of prints that consists of 2 small prints and one large print (that is, twice as many small prints as large). The value of that set will be ...

... 2×$20 +45 = $85

To have revenue of at least $510, the studio must sell ...

... $510/$85 = 6

sets of prints. That is, the studio needs to sell at least 6 large prints and 12 small ones.

_____

<em>With an equation</em>

Let x represent the number of large prints the studio needs to sell. Then 2x will represent the number of small prints. Total sales will be ...

... 20·2x +45·x ≥ 510

... 85x ≥ 510

... x ≥ 510/85

... x ≥ 6

The studio needs to sell at least 6 large prints and 12 small prints.

8 0
3 years ago
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