Determine the Value Of $e ^ { - a / \theta } \text { for } \theta = 2 \text { and } a = 3$

Determine the value of $e ^ { - a / \theta } \text { for } \theta = 2 \text { and } a = 3$

A) 0.223130
B) 0.513417
C) -4.481689
D) 4.481689