<h2>
Answer:</h2>
Variance
<h2>
Step-by-step explanation:</h2>
The standard deviation is related to the variance. The standard deviation measures the variation or dispersion of a set of data and is represented by the Greek letter sigma 
, while the variance measures how far a set of numbers are spread out from their average value. The variance is obtained by squaring the standard deviation, so the variance can be found as 
Once you combine like terms you are left with 18k +3.
Answer:
the last one? i think.
Step-by-step explanation:
432.2 / 4 = 108.1 <== avg of what 1 tank holds
1/2 full = 108.1/2 = 54.05
