Which ordered pair is a solution of the equation y=-2x-5
2 answers:
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<span> For this case, the first thing we must do is define variables.
We have then:
x: number of devices.
Y: plan charge
For the current plan we have:
</span>
<span> For the new plan we have:
</span>
<span> Since we want the new plan to be smaller than the current plan, then we have:
</span>
<span> From here, we clear the value of x:
</span>
<span> Answer:
x <18
Note: The graph is correct</span>
We have then:
x: number of devices.
Y: plan charge
For the current plan we have:
</span>
<span> For the new plan we have:
</span>
<span> Since we want the new plan to be smaller than the current plan, then we have:
</span>
<span> From here, we clear the value of x:
</span>
<span> Answer:
x <18
Note: The graph is correct</span>
A Coca-Cola bottle is roughly a cylinder, so you would do the formula below.
Answer:
So we have at least 88.89% of the noise level values within 3 deviation from the mean.
Step-by-step explanation:
For this case let define the random variable X as the noise level, we know the following properties for X:
And for this case we don't know the distribution for the random variable X.
But we can use the Chebysev theorem who states that the minimum percentage of the data that lies within k standard deviations from the mean is given by:
So for this case we have that k = 3 and if we use this theorem we have:
And we can convert this into % and we got:
So we have at least 88.89% of the noise level values within 3 deviation from the mean.