Answer
$f(6)=320$
Work Step by Step
The given function is
$\Rightarrow f(x)=5(2)^x$
Substitute $6$ for $x$.
$\Rightarrow f(6)=5(2)^6$
$\Rightarrow f(6)=5\cdot 2^6$
Use $2^6=64$.
$\Rightarrow f(6)=5\cdot 64$
Simplify.
$\Rightarrow f(6)=320$