Answer
$R(4)=408$
$R(6)=468$
$R(8)=438$
Work Step by Step
$R(p)=-12p^2+150p$
$R(4)=-12(4)^2+150(4)=-192+600=408$
$R(6)=-12(6)^2+150(6)=-432+900=468$
$R(8)=-12(8)^2+150(8)=-768+1200=438$
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