Solve the Problem $\mathrm { r } = \frac { \mathrm { a } \left( 1 - \mathrm { e } ^ { 2 } \right) } { 1 + \mathrm { e } \cos \theta }$

Multiple Choice

Solve the problem.
-Given that the polar equation $\mathrm { r } = \frac { \mathrm { a } \left( 1 - \mathrm { e } ^ { 2 } \right) } { 1 + \mathrm { e } \cos \theta }$ models the orbits of the planets, estimate the closest approach of Pluto's orbit, for which $\mathrm { a } = 39.4$ and $\mathrm { e } = 0.249$ , to the sun.

A) About 50 astronomical units
B) About 74 astronomical units
C) About 39 astronomical units
D) About 30 astronomical units