Suppose$\backslash$:a$\backslash$:product's$\backslash$:revenue$\backslash$:function$\backslash$:is$\backslash$:given$\backslash$:by$\backslash$:R$\backslash$left$($q$\backslash$right$)=-7$q$^2+300$q$\backslash$:$.$Find$\backslash$:an$\backslash$:expression$\backslash$:for$\backslash$:the$\backslash$:marginal$\backslash$:revenue$\backslash$:function,$\backslash$:simplify$\backslash$:it$,\backslash$:and$\backslash$:record$\backslash$:your$\backslash$:result$\backslash$:in$\backslash$:the$\backslash$:box$\backslash$:below.$\backslash$:Be$\backslash$:sure$\backslash$:to$\backslash$:use$\backslash$:the$\backslash$:proper$\backslash$:variable$\backslash$:in$\backslash$:your$\backslash$:answer.$\backslash$:$\backslash$left$($Use$\backslash$:the$\backslash$:preview$\backslash$:button$\backslash$:to$\backslash$:check$\backslash$:your$\backslash$:syntax$\backslash$:before$\backslash$:submitting$\backslash$:your$\backslash$:answer.$\backslash$right$)$