Solve the Problem $y = e ^ { - 8 x }$

Multiple Choice

Solve the problem.
-Find the mass of a thin infinite region in the first quadrant bounded by the coordinate axes and the curve $y = e ^ { - 8 x }$ if $\delta ( x , y ) = x y$ .

A) $\frac { 1 } { 512 }$
B) $\frac { 1 } { 192 }$
C) $\frac { 1 } { 256 }$
D) $\frac { 1 } { 96 }$