Question

Accepted Answer

(a) $\frac{540}{x}$; (b) $(\frac{540}{x}-6)(x+3)$; (c)(i) $(\frac{540}{x}-6)(x+3)=648$, so $x^2+21x-270=0$; (ii) $x=9$; (d) $54$.

Broken stock and target profit