$$\text { If the infinite curve } y = e ^ { - x } , x \geq 0 \text {, is rotated about the } x \text {-axis, find the area of the resulting surface. }$$

Short Answer

$$\text { If the infinite curve } y = e ^ { - x } , x \geq 0 \text {, is rotated about the } x \text {-axis, find the area of the resulting surface. }$$