It’s too small zoom in some I will be glad to assist you
The product of the expression
is
or
.
<h3>What are exponents and powers?</h3>
Power can be defined as an expression that represents repeated multiplication of the same number whereas exponent is the quantity that represents the power to which the number is raised.
Given expression is : 
=
=
[
]
=
Hence,
=
Learn more about exponents and powers here:
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we have that he paid 4 dollars due the delivery. So each pizza costs

so the equation to find the price r is
Answer:
Empirical Rule
Step-by-step explanation:
The Empirical Rule is also known as the Sigma rule or the 68-95-99.7% rule. The rule state that for a given data set, 68% of all data values will fall within the first standard deviation from the mean. The rule also states that 95% of all data values would fall within two standard deviations, while almost all the data which amounts to about 99.7% will fall within three standard deviations.
The empirical rule is used in forecasting based on the given datasets because it is a certainty that after obtaining the standard deviation, data values can be assigned to the categories they fall into, under the Empirical rule.