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Inga [223]
3 years ago
11

(I’m marking brainliest) plzzz help me out!!!

Mathematics
1 answer:
larisa86 [58]3 years ago
4 0

Answer:

14, 16, 18, 20

Step-by-step explanation:

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During a rock concert, the noise level (in decibels) in front row seats has a mean of 92 dB with a standard deviation of 9 dg_ W
rodikova [14]

Answer:

The minimum percentage of noise level readings within 8 standard deviations of the mean is 98.44%.

Step-by-step explanation:

When we do not know the shape of the distribution, we use the Chebyshev's Theorem to find the minimum percentage of a measure within k standard deviations of the mean.

This percentage is:

p = 1 - \frac{1}{k^{2}}

Within 8 standard deviations of the mean

This means that k = 8. So

p = 1 - \frac{1}{8^{2}} = 1 - \frac{1}{64} = \frac{64 - 1}{64} = \frac{63}{64} = 0.9844

The minimum percentage of noise level readings within 8 standard deviations of the mean is 98.44%.

6 0
4 years ago
Mr. Smith is 81 years older than his grandson, Victor. In 3 years, Mr. Smith will be four times as old as Victor. How old is Vic
puteri [66]
<h3>Answer :- </h3>

  • 24 years

<h3>Solution :- </h3>

  • Let the age of victor be X .
  • and, the age of Mr.Smith be = 81 + x

♧ <em>So, after 3 years = x+81 +3</em>

  • 81 + 3 + x = 4 ( x + 3 )
  • 84 + x = 4x + 12

♧ <em>now grouping the variables and constants together we get,</em>

  • 4x-x=84-12
  • 3x = 72
  • x = 72/3
  • x = 24

♧ <em>Thus, Victor's present age is 24 yrs.</em>

<em>H</em><em>o</em><em>p</em><em>e</em><em> </em><em>it</em><em> </em><em>helps</em><em> </em><em>ya</em><em> </em><em>~</em><em> </em>

4 0
2 years ago
Read 2 more answers
Help please.!!
Dafna11 [192]

Answer: The answer is (y^2) to the power of -0.5

Step-by-step explanation:

8 0
3 years ago
A decorative hat is shaped like a cone. The hat has a 7 inch diameter and an 8 inch height.
svetoff [14.1K]

Step-by-step explanation:

the answer to this question is 410.29

sorry if this is wrong

4 0
2 years ago
PLEASE HELP! AS SOON AS POSSIBLE I HAVE TO BE DONE IN 10 MINS !
jolli1 [7]

Answer:

D

Step-by-step explanation:

6 0
3 years ago
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