The Moon's Density, When Compared to Earth's, Is About

question 74

Multiple Choice

The Moon's density, when compared to Earth's, is about

• A) 10% as large.
• B) 25% as large.
• C) 50% as large.
• D) 60% as large.
• E) the same.

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Definitions:

Marginal Utility

The additional satisfaction or utility gained from consuming or using one more unit of a good or service.

Interest Rate

The percentage of a sum of money charged for its use, which can be seen as the cost of borrowing money or the return on saving.

Rule Of 70

A method used to estimate the number of years it will take for a variable to double, calculated by dividing 70 by the annual growth rate.

Interest Rate

The proportion of a specified sum that is added as a charge for borrowing it, usually stated as an annual rate.