Evaluate the Expression Without Using a Calculator

question 78

Multiple Choice

Evaluate the expression without using a calculator.
-The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by pH = -log x where x represents the concentration of the hydrogen ions in the
Solution in moles per liter. Find the pH if the hydrogen ion concentration is 1 × 10-6.

• A) 8
• B) -8
• C) 6
• D) -6

---

Definitions:

Total Contribution Margin

The difference between a company's sales revenue and variable costs, representing the amount available to cover fixed costs and contribute to profit.

Net Operating Income

A measure of a company's profitability excluding interest and tax expenses.

Operating Income

This is the profit realized from a business's operations, calculated by subtracting operating expenses from gross profit.

Total Contribution Margin

The difference between total sales revenue and total variable costs, indicating the amount available to cover fixed expenses and generate profit.