Suppose demand is given by the equation: 
At what price will total revenue be maximized?
Definitions:
Television
An electronic device for receiving and displaying images and sounds transmitted over distances.
Coefficient of Determination
The coefficient of determination, often denoted as R^2, measures the proportion of the variance in the dependent variable that is predictable from the independent variable(s).
Total Variability
Refers to the overall variability observed in a data set, encompassing all sources of variation.
Sample Mean
The average of all the data points in a sample, which can be used to estimate the population mean.
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