X - 2y = - 7:(.3), (-9, )
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You can compute both the mean and second moment directly using the density function; in this case, it's
Then the mean (first moment) is
and the second moment is
The second moment is useful in finding the variance, which is given by
You get the standard deviation by taking the square root of the variance, and so
The volume of the can is 56.52 in³.
To find the volume of the of a cylinder (the shape of a can) you would use:
r²h.
=3.14
r²=3² (radius squared)
h=2 (height)
3.14·3²·2
28.26·2
56.52
To find the volume of the of a cylinder (the shape of a can) you would use:
r²=3² (radius squared)
h=2 (height)
3.14·3²·2
28.26·2
56.52