Choose the One Alternative That Best Completes the Statement or Answers

question 143

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Write the domain in interval notation.
- $$f ( x ) = \frac { 7 x - 1 } { 4 x ^ { 2 } - 27 x - 81 }$$

• A) \(\left( - \infty , - \frac { 9 } { 4 } \right) \cup \left( - \frac { 9 } { 4 } , 9 \right) \cup ( 9 , \infty )\)
• B) \(\left( - \infty , - \frac { 9 } { 4 } \right) \cup \left( - \frac { 9 } { 4 } , \frac { 1 } { 7 } \right) \cup \left( \frac { 1 } { 7 } , 9 \right) \cup ( 9 , \infty )\)
• C) \(( - \infty , - 9 ) \cup \left( - 9 , - \frac { 9 } { 4 } \right) \cup \left( \frac { 9 } { 4 } , \infty \right)\)
• D) \(( - \infty , - 9 ) \cup \left( - 9 , - \frac { 1 } { 7 } \right) \cup \left( - \frac { 1 } { 7 } , \frac { 9 } { 4 } \right) \cup \left( \frac { 9 } { 4 } , \infty \right)\)

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Definitions:

Standard Hours

The predetermined amount of time expected to complete a unit of work or job, serving as a benchmark for productivity and performance measurement.

Actual Output

The real quantity of goods or services produced by a company during a specific period.

Labour Efficiency Variance

The difference between the actual labor hours worked and the standard hours planned, multiplied by the standard labor rate.

Standard Labour Rate

A pre-established rate used to calculate the labor cost element of a product or service, based on expected wage rates.