Evaluate the Given Function
- $f(x)=2^{-x}, f(5)$ A) -32
B) $\frac{1}{32}$ C) $\frac{2}{5}$

Evaluate the given function
- $f(x) =2^{-x}, f(5)$

A) -32
B) $\frac{1}{32}$
C) $\frac{2}{5}$
D) $\frac{1}{10}$