What I gather from the question is that
has second moment
and variance
, and you're asked to find the expectation and variance of the random variable
.
From the given second moment and variance, we find the expectation of
:

Expectation is linear, so

Using the same variance identity, we have

and

so that

Alternatively, we can use the identity

m∠STP = 90°
The diagonals inside the square are perpendicular lines, meaning they form 90° angles
So you have to divide the amount by how many you’re buying and get the unit rate per each ounce so the answer is b
Answer:
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8.34 * 3 = 25.02
8.34 * 0.5 = 4.17
25.02 + 4.17 = 29.19
Step-by-step explanation:
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Answer:
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