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brilliants [131]
2 years ago
6

How to find sample size with unknown standard deviation

Mathematics
1 answer:
ioda2 years ago
6 0

Answer:

za/2: Divide the confidence level by two, and look that area up in the z-table: .95 / 2 = 0.475. ...

E (margin of error): Divide the given width by 2. 6% / 2. ...

: use the given percentage. 41% = 0.41. ...

: subtract. from 1.

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What is the length of the hypotenuse? If necessary, round to the nearest tenth.
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Answer:

7 feet

Step-by-step explanation:

Pythagorean theorem

sqrt(4.5^2 + 5.3^2) = hypotenuse

sqrt(48.34) = hypotenuse

6.95269732 = hypotenuse

round to nearest tenth

7 feet = the length of the hypotenuse

5 0
2 years ago
Evaluate :<br> A. <img src="https://tex.z-dn.net/?f=x%5E%7Bx%5E3%7D%3D3" id="TexFormula1" title="x^{x^3}=3" alt="x^{x^3}=3" alig
sdas [7]

Answer:

<h3>A. </h3>
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<h3>B.</h3>
  • 4ˣ + 6ˣ = 9ˣ
  • 2²ˣ + 2ˣ3ˣ = 3²ˣ

<u>Divide both sides by 2²ˣ</u>

  • 1 + (3/2)ˣ = (3/2)²ˣ

<u>Substitute (3/2)ˣ = t</u>

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<u>Solve for t:</u>

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<u>Positive root is considered as (3/2)ˣ can't be negative.</u>

  • (3/2)ˣ = (1 + √5)/2
  • x = log [(1 + √5)/2] / log (3/2)
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7 0
3 years ago
Please help me, I don’t understand!
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Answer:

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Step-by-step explanation:

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4 0
3 years ago
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Vesna [10]

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8 0
3 years ago
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What is the angle measure to angle a
postnew [5]

Answer:

56

Step-by-step explanation:

7 0
3 years ago
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