Multiply Write the Result in the Form a + Bi $\left( \frac { 1 } { 5 } - \frac { 1 } { 7 } \mathrm { i } \right) \left( \frac { 1 } { 2 } + \frac { 3 } { 7 } \mathrm { i } \right)$

question 133

Multiple Choice

Multiply. Write the result in the form a + bi.
- $\left( \frac { 1 } { 5 } - \frac { 1 } { 7 } \mathrm { i } \right) \left( \frac { 1 } { 2 } + \frac { 3 } { 7 } \mathrm { i } \right)$

• A) \(\frac { 79 } { 490 } - \frac { 1 } { 70 } \mathrm { i }\)
• B) \(\frac { 79 } { 490 } + \frac { 11 } { 70 } \mathrm { i }\)
• C) \(\frac { 79 } { 490 } + \frac { 1 } { 70 } \mathrm { i }\)
• D) \(\frac { 79 } { 490 } - \frac { 11 } { 70 } i\)

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Definitions:

Direct Method

A method of allocating service departments' costs directly to production departments without intermediate allocations.

Machine Hours

Machine hours represent the total time a machine is operated within a specific period. This metric is often used in manufacturing to allocate costs based on machine usage.

Number Of Employees

The total count of individuals employed by a company, including both full-time and part-time workers.

Step-down Method

An allocation method used in cost accounting to distribute overhead costs from service departments to producing departments based on a hierarchy of service relationships.