The Mass Number of an Atom of 128_Xe Is ________

question 114

Multiple Choice

The mass number of an atom of 128_Xe is ________.

• A)54
• B)182
• C)74
• D)128
• E)120

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Definitions:

Contribution Margin

The amount by which sales revenue exceeds variable costs of goods sold, indicating how much revenue contributes towards covering fixed costs and generating profit.

Variable Costs

Expenses that change in proportion to the level of production or sales activity, such as raw materials and direct labor.

Break-even Sales

The amount of revenue needed to cover total costs, resulting in neither profit nor loss.

Variable Costs

Costs that vary in proportion to the level of activity or volume of production in a business.