a) substitution (refer to statements 1 and 2)
b) definition of supplementary
c) subtraction property of equality
Answer:
2.35 calls
Step-by-step explanation:
The presented scenario can be modeled by a Poisson distribution with an average number of calls (μ) of 5.5 during the noon hour on Mondays.
Therefore, the standard deviation for the number of calls received, X, is given by:

The standard deviation of X is 2.35 calls.
Volume of a cube is a side length cubed
So 7*7*7
Answer is 343 centimeters