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ozzi
3 years ago
9

Economists often track employment trends by measuring the proportion of people who are "underemployed," meaning they are either

unemployed or would like to work full time but are only working part-time. In the summer of 2013, 17.6% of Americans were "underemployed." The mayor of Thicksburg wants to show the voters that the situation is not as bad in his town as it is in the rest of the country. His staff takes a simple random sample of 300 Thicksburg residents and finds that 45 of them are underemployed. Do the data give convincing evidence that the proportion of underemployed in Thicksburg is lower than elsewhere in the country?
Mathematics
1 answer:
Alenkinab [10]3 years ago
5 0

Answer:

no

Step-by-step explanation:

Take 45 and divide by 300 to find the percent that are underemployed

45/ 300 =.15

Changing to percent form

15%

The sample is fairly small.  Depending on the population of Thicksburg, this could be too small to give an accurate representation.  Less than 3% difference between the national average and the population of Thicksburg is not enough to convince the people that their population has significantly lower underemployment

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Find 2x2 − 2z4 + y2 − x2 + z4 if x = −4, y = 3, and z = 2.<br><br> Is -3 the correct answer?
Ket [755]
We're given the algebraic expression 2x^2 - 2z^4 + y^2 - x^2 + z^4

By hypothesis, x = -4, y = 3 and z = 2

Let's replace each letter by its given value:

2x^2 - 2z^4 + y^2 - x^2 + z^4
2(-4)^2 - 2(2)^4 + (3)^2 - (-4)^2 + (2)^4
(2*16) - 2*16 + 9 - 16 + 16
32 - 32 + 9 - 16 + 16
9

So wrong. The correct answer is not -3, but 9.

Hope this helps! :D
6 0
3 years ago
Can someone help out ??
kupik [55]

Answer:

120 cubes

Step-by-step explanation:

Find the volume of the prism and then divide it by the volume of one cube (which is 1/27 cm):

V = length*width*height = (5/3 cm)(4/3 cm)(2 cm) = 40/9 cm³.

Dividing this result by 1/27 yields

40       27         40*3    

------ * ------ = -------------- = 120

  9        1               1

120 cubes (answer)

7 0
3 years ago
Solve the inequality of c=20x+19,152 r=24x
Alex Ar [27]
The answer is there with the attached peice

6 0
3 years ago
For f(x) = 1/3x +5 <br><br> f(3) =
Mrrafil [7]

Answer:

f(3) = 6

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
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<u>Algebra I</u>

  • Function Notation

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = 1/3x + 5

f(3) is x = 3

<u>Step 2: Evaluate</u>

  1. Substitute:                    f(3) = 1/3(3) + 5
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3 0
3 years ago
Determine whether the number is a perfect square 47
Ghella [55]
Perfect squares are n² where n is a whole number
whole numbers are like 0,1,2,3,4,5,6, etc
no decimal or fractions

we can do that be looking at the perfect squares we know
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3²=9
4²=16
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etc

so we see 47 is between 6² and 7²
therefor, for n²=47, n is between 6 and 7 and is therfore not a whole number
that makes 47 not a perfect square
7 0
3 years ago
Read 2 more answers
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