Use a Graphing Calculator to Evaluate the Series $$\sum _ { j = 2 } ^ { 8 } \left( 2 j ^ { 2 } - 12 \right)$$

question 123

Multiple Choice

Use a graphing calculator to evaluate the series.
- $$\sum _ { j = 2 } ^ { 8 } \left( 2 j ^ { 2 } - 12 \right)$$

• A) 116.67
• B) 322
• C) 490
• D) -28

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Definitions:

Contribution Margin

The portion of sales income available to cover fixed expenses and contribute to net profit, after covering all variable expenses.

Financial Advantage

The benefit gained in financial terms, which might include profitability, revenue growth, or value creation, compared to a baseline or competitors.

Fixed Manufacturing Expenses

These are the expenses that remain constant regardless of the amount of goods produced, including rent for factory buildings or lease payments for manufacturing equipment.

Fixed Selling

Expenses that remain constant regardless of the level of sales or production, such as salaries of sales managers and rental charges of retail spaces.