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Natali5045456 [20]
3 years ago
14

In a survey of 200 professors at Gotham University, professors were asked, “Regarding your weight, do you think you are: About r

ight? Overweight? Underweight?” The following contingency table displays the results of the survey. Perception of Weight Gender About Right Overweight Underweight Total Female 80 39 3 122 Male 52 10 16 88 Total 132 49 19 200 One professor will be selected at random from the 200 professors involved in the survey. What is the probability that this professor is female and feels "About Right"? Question 5 options: 1.27 0.61 0.92 0.40 0.66
Mathematics
1 answer:
DochEvi [55]3 years ago
3 0

The probability that a randomly selected professor is female and feels "About Right" is 0.40

The distribution table :

____About right _ Oweight _ Uweight __ Total

Female _ 80 _____ 39 ______ 3 _______ 122

Male ___ 52 _____ 10 ______ 16 _______ 88

Total ___ 132 ____ 49 ______ 19 _______ 200

Oweight = Overweight

Uweight = Underweight

Recall :

Probability = required outcome / Total possible outcomes

Probability that a selected professor is female and feels 'About right' :

Required outcome = number of female professors who feels 'About right' = 80

Total number of professors = 200

Hence,

P(Female and 'About right') = 80/200 = 0.40

Learn more : brainly.com/question/11234923

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Answer

the number of  donuts sold is: 693

Step-by-step explanation:

i get this answer by taking:

231 x 3 = and that equal 693. this is the number  of donuts sold.

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3 years ago
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Which describes how triangle FGH could be transformed to triangle F prime G prime H prime in two steps? On a coordinate plane, t
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Answer:

  • <u><em>A dilation by a scale factor of 4 and then a reflection across the x-axis </em></u>

Explanation:

<u>1. Vertices of triangle FGH:</u>

  • F: (-2,1)
  • G: (-3,3)
  • H: (0,1)

<u>2. Vertices of triangle F'G'H':</u>

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  • G': (-12,-12)
  • H': (0, -4)

<u>3. Solution:</u>

Look at the coordinates of the point H and H': to transform (0,1) to (0,-4) you can muliply each coordinate by 4 and then change the y-coordinate from 4 to -4. That is<em> a dilation by a scale factor of 4 and a reflection across the x-axis.</em> This is the proof:

  • Rule for a dilation by a scale factor of 4: (x,y) → 4(x,y)

       (0,1) → 4(0,1) = (0,4)

  • Rule for a reflection across the x-axis:{ (x,y) → (x, -y)

        (0,4) → (0,-4)

Verfiy the transformations of the other vertices with the same rule:

  • Dilation by a scale factor of 4: multiply each coordinate by 4

       4(-2,1) → (-8,4)

       4(-3,3) → (-12,12)

  • Relfection across the x-axis: keep the x-coordinate and negate the y-coordinate

        (-8,4) → (-8,-4) ⇒ F'

        (-12,12) → (-12,-12) ⇒ G'

Therefore, the three points follow the rules for <em>a dilation by a scale factor of 4 and then a reflection across the x-axis.</em>

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3 years ago
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Marta hopes to have a test average of at least 90 by the end of the marking period. Her grades on the first four tests have been
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Answer:

 Marta need to score at least 94 to receive an average of 90 or higher considering all five tests.

Explanation:

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 Let mark received in fifth test be x

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Answer: 3√10 or v=−3√10

Step-by-step explanation:

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