Find an Equation for the Ellipse Described $( \pm 2,0 ) ; \quad x$

question 87

Multiple Choice

Find an equation for the ellipse described.
-Foci at $( \pm 2,0 ) ; \quad x$ -intercepts are $\pm 7$

• A) \(\frac { x ^ { 2 } } { 45 } + \frac { y ^ { 2 } } { 49 } = 1\)
• B) \(\frac { x ^ { 2 } } { 4 } + \frac { y ^ { 2 } } { 49 } = 1\)
• C) \(\frac { x ^ { 2 } } { 4 } + \frac { y ^ { 2 } } { 45 } = 1\)
• D) \(\frac { x ^ { 2 } } { 49 } + \frac { y ^ { 2 } } { 45 } = 1\)

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Definitions:

Margin of Safety

The difference between actual or expected sales and the sales level at which a business breaks even; it measures operational risk.

Unit Sales Price

The amount of money charged for each individual unit of a product or service.