Which points are on the graph of f(x)=(1/3)^x?
1 answer:
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Answer:
99.38%
Step-by-step explanation:
We have that the mean (m) is equal to 124, the standard deviation (sd) 6.4 and the sample size (n) = 64
They ask us for P (x <126)
For this, the first thing is to calculate z, which is given by the following equation:
z = (x - m) / (sd / (n ^ 1/2))
We have all these values, replacing we have:
z = (126 - 124) / (6.4 / (64 ^ 1/2))
z = 2.5
With the normal distribution table (attached), we have that at that value, the probability is:
P (z <2.5) = 0.9938
The probability is 99.38%
The circumference is 26
To find this we must start by finding the radius of the circle. You can find this using the formula for area adjusted to find the radius.
r =
Then when we plug the area in for A, we get the radius to be 13.
We can then use that number in the circumference formula which is below.
C = 2r
Using that we can find the circumference to be 26
To find this we must start by finding the radius of the circle. You can find this using the formula for area adjusted to find the radius.
r =
Then when we plug the area in for A, we get the radius to be 13.
We can then use that number in the circumference formula which is below.
C = 2
Using that we can find the circumference to be 26