Mr. Fuller earned a 5 percent commission or $125. Of the sale of an air conditioner. How much did the air conditioner cost?
1 answer:
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Correlation between x & y is 0.6125.
In probability theory and statistics, the cumulative distribution function of a real-valued random variable X, or simply the distribution function of X weighted by x, is the probability that X takes a value less than or equal to x.
The cumulative distribution function (CDF) of a random variable X is defined as FX(x)=P(X≤x) for all x∈R. Note that the subscript X indicates that this is the CDF of the random variable X. Also note that the CDF is defined for all x∈R. Let's look at an example.
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Answer:
We can use the sample about 42 days.
Step-by-step explanation:
Decay Equation:
Integrating both sides
When t=0, N= = initial amount
.......(1)
.........(2)
Logarithm:
130 days is the half-life of the given radioactive element.
For half life,
,
days.
we plug all values in equation (1)
We need to find the time when the sample remains 80% of its original.
We can use the sample about 42 days.