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Snowcat [4.5K]
2 years ago
15

A survey asked 40 people if they were concerned about the environment - 6 said that they were very concerned. Which of the follo

wing statements correctly describes how the confidence interval for the population proportion of people that are very concerned about the environment should be computed?
Mathematics
1 answer:
LenaWriter [7]2 years ago
5 0

Answer:

There are not 15 failures and 15 successes. A confidence interval can be computed by adding  2 failures and 2 successes .

Step-by-step explanation:

Given that

Survey asked by 40 people

6 said that they were very concerned.

So the following statements correctly describe the above problem

The correct statement is , There are not 15 failures and 15 successes. A confidence interval can be computed by adding  2 failures and 2 successes .

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Answer:

If both Kelsey and Jeana purchase 6 pairs of uniform pants then they would pay the same amount for their purchases.

Step-by-step explanation:

The information provided is as follows:

  • Kelsey buys several pairs of uniform pants for $17.95 each, and a sweater for $24.
  • Jeana shops at a different store and buys several pairs of uniform pants for $18.95 each, plus a sweater for $18.

The variable <em>x</em> is the number of pairs of pants.

The total cost function for Kelsey will be:

TC_{K}=17.95\cdot x+24

The total cost function for Jeana will be:

TC_{J}=18.95\cdot x+18

Consider that both pay the same total cost for their purchases.

Compute the value of <em>x</em> as follows:

            TC_{K}=TC_{J}

17.95\cdot x+24=18.95\cdot x+18\\\\18.95\cdot x-17.95\cdot x=24-18\\\\x=6

Thus, if both Kelsey and Jeana purchase 6 pairs of uniform pants then they would pay the same amount for their purchases.

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Using the graph below, find values for the radius r, the angle theta (in both degrees and radians), and the coordinates for the
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y coordinate : cos(90-teta)= y/r
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