The product of expressions or numbers is calculated by multiplying the expressions or numbers.
- The incorrect value in the table is

- The value that should have been written is

From the table (see attachment), the incorrect product is given as:

The above product is incorrect.
This is so because when -y is multiplied by 2x, the result is 
So, the correct expression is:

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Answer:
The formula for an average rate of return is derived by dividing the average annual net earnings after taxes or return on the investment by the original investment or the average investment during the life of the project and then expressed in terms of percentage.