Find the Directrices of the Ellipse $$4 \mathrm { x } ^ { 2 } + \mathrm { y } ^ { 2 } = 4$$

question 250

Multiple Choice

Find the directrices of the ellipse.
- $$4 \mathrm { x } ^ { 2 } + \mathrm { y } ^ { 2 } = 4$$

• A) \(\mathrm { y } = \pm \frac { 4 } { \sqrt { 3 } }\)
• B) \(x = \pm \frac { 4 } { \sqrt { 5 } }\)
• C) \(x = \pm \frac { 4 } { \sqrt { 3 } }\)
• D) \(y = \pm \frac { 2 } { \sqrt { 3 } }\)

---

Definitions:

Johnson's Rule

A scheduling technique that minimizes the total time required to process a group of jobs on two machines by ordering the jobs intelligently.

Body Work Time

The duration of time allocated for or spent on the physical repair or refurbishment of a vehicle's body.

Paint Time

The duration required to apply and dry paint on a product, significant in manufacturing and production scheduling.

Makespan

The total time needed to complete a set of tasks, from the start of the first task to the end of the last one.