A Scientist Is Creating a Formula Diet That Supplies All

question 83

Multiple Choice

A scientist is creating a formula diet that supplies all essential nutrients.One of the minerals in her formula has a Recommended Dietary Allowance of 130 mg/day.How should she classify this particular mineral?

• A)Trace mineral
• B)Major mineral
• C)Possible essential mineral 
• D)Nonessential mineral 

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Definitions:

Average Tax Rate

The average tax rate is the proportion of total taxable income paid in taxes, calculated by dividing the total tax paid by the total income.

Marginal Tax Rate

The rate at which the last dollar of income is taxed.

Lump-Sum Tax Rate

A tax that is a fixed amount, no matter the change in circumstance of the taxed entity. This creates a situation where the tax burden falls more heavily on those with lower income or profit.

Marginal Tax Rate

The amount of tax applied to an additional dollar of income, often used in progressive tax systems.