Answer:
Between 38 and 86 months.
Step-by-step explanation:
Chebyshev Theorem
The Chebyshev Theorem can also be applied to non-normal distribution. It states that:
At least 75% of the measures are within 2 standard deviations of the mean.
At least 89% of the measures are within 3 standard deviations of the mean.
An in general terms, the percentage of measures within k standard deviations of the mean is given by 
.
In this question:
Mean of 62, standard deviation of 12.
Between what two lifetimes does Chebyshev's Theorem guarantee that we will find at least approximately 75% of the computers?
Within 2 standard deviations of the mean, so:
62 - 2*12 = 38
62 + 2*12 = 86
Between 38 and 86 months.
Answer:
439.6 cm²
Step-by-step explanation:
Surface area of the cylinder is the length of the rectangular strip that goes around, and the are of the two circles
Area circle = πr²
Area circle = 3.14 * 7²
Area circle = 3.14 * 49
Area circle = 153.86
The area of both circles is 153.86 x 2 = 307.72
The rectangular strip is the diameter by the height
Diameter = 2πr
Diameter = 14*3.14 = 43.96
The strip is 43.96 x 3 = 131.88
Total surface area is 307.72 + 131.88 = 439.6
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-Chetan K
Answer:
2×4=8 + 4 = 12 y stands firm you do the y part 2 times
1st set = 4 letters
2nd set = 4x 4 = 16 letters
3rd set = 16 x 4 = 64 letters
4th set = 64 x 4 = 256 letters
5th set = 256 x 4 = 1,024 letters
6th set =1024 x 4 = 4,096 letters
7th set = 4096 x 4 = 16,384 letters
8th set = 16,384 x 4 = 65,536 letters
Each letter cost 2
Total cost = 65,536 x 2 = 131,072
