Answer:
Minimum percentage = 88.89%
Step-by-step explanation:
We are given the following in the question:
Mean, μ = 95 dB
Standard Deviation, σ = 8 dB
Chebyshev's rule:
- According to this rule atleast
percent of data lies within k standard deviation of mean.
We have to find the minimum percent of data lying within 3 standard deviations of the mean.
Putting values, we get,
![1 - \dfrac{1}{(3)^2} = 88.89\%](https://tex.z-dn.net/?f=1%20-%20%5Cdfrac%7B1%7D%7B%283%29%5E2%7D%20%3D%2088.89%5C%25)
Thus, minimum 88.895 of data lies within 3 standard deviations of the mean.
It is 1,000,000x larger:
0.1 / 0.000000001 = 1,000,000
B is the answer to this question
Answer:
D) a = - 5/2
Step-by-step explanation:
2x -5y - 7 = 0
5y = 2x - 7
y = 2/5 x - 7
the slope of this line is therefore 2/5 (factor of x).
the perpendicular slope is then (exchange y and x and flip the sign) -5/2, which is then a and the factor of x.