Find a Formula for the Inverse of the Function Described $C$

question 353

Multiple Choice

Find a formula for the inverse of the function described below.
-A size 4 dress in Country $C$ is size 42 in Country D. A function that converts dress sizes in Country $C$ to those in Country $D$ is $f ( x ) = x + 38$ .

• A) \(f ^ { - 1 } ( x ) = x - 38\)
• B) \(\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { - 38 }\)
• C) \(f ^ { - 1 } ( x ) = x + 38\)
• D) \(\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { 38 }\)

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Definitions:

Deposit

A sum of money placed into a bank account or handed over as a partial payment or security for the purchase of an item.

Compounded Annually

Refers to the process of earning interest on both the principal and the accumulated interest from previous periods, calculated once per year.

Investment Pays

The returns or profits received from an investment.

Annuities

Financial products that provide a series of payments over time, usually for retirement income.