Evaluate
-If $f ( x ) = \sqrt { 2 x - 6 }$

question 282

Multiple Choice

Evaluate.
-If $f ( x ) = \sqrt { 2 x - 6 }$ , find the value of $f ( 21 )$ .

• A) 36
• B) 6
• C) \(\sqrt { 42 }\)
• D) 42

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Definitions:

Energy

The capacity to do work or the power derived from the utilization of physical or chemical resources.

Food

Any nutritious substance that people or animals eat or drink to maintain life and growth.

Fat

A natural oily or greasy substance occurring in animal bodies, especially when deposited as a layer under the skin or around certain organs.

Calories

A unit of energy used to measure the amount of energy contained in food and drink and the energy expended during physical activity.