Answer
$f(-3)=8$
Work Step by Step
The given function is
$\Rightarrow f(x)=0.5^x$
Substitute $-3$ for $x$.
$\Rightarrow f(-3)=0.5^{-3}$
Evaluate the power.
$\Rightarrow f(-3)=\frac{1}{0.5^{3}}$
Simplify.
$\Rightarrow f(-3)=\frac{1}{0.125}$
$\Rightarrow f(-3)=8$.
