Answer
$G(h)=15h$
$N(G)=G(1-0.2)=0.8G$
$N\circ G=12h$
Work Step by Step
Gross salary:
$G(h)=15h$
Net Salary:
$N(G)=G(1-0.2)=0.8G$
$N\circ G= N(G(h))=0.8(15h)=12h$
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