Answer:
Variance = 4.68
Step-by-step explanation:
The formula for the variance is:

Where:

The mean can be calculated as each value multiplied by its probability


Replacing the mean and the summatory of X:

Answer:
191.1 cm^3
Step-by-step explanation:
Easily done! Just do -56 divided by -7 but just remember two negatives equal a positive. So your answer would be 8!
I believe the term is "constant".