Answer
$8$.
Work Step by Step
The given equation is
$\Rightarrow S=\frac{kA}{P}$
Substitute $A=60,000,P=40$ and $S=12,000$.
$\Rightarrow 12,000=\frac{k60,000}{40}$
Simplify.
$\Rightarrow 12,000=1,500k$
Divide both sides by $1,500$.
$\Rightarrow \frac{12,000}{1,500}=\frac{1,500k}{1,500}$
Simplify.
$\Rightarrow 8=k$
Hence, the value of $k$ is $8$.
