Answer
$ R(p)=700p^{0.716}\qquad$ million dollars/year
$R(70)\approx 14.66$ billion dollars/year
Work Step by Step
Revenue= (price)$\times$(quantity)
$R(p)=p\cdot q(p)=p[700p^{-0.284}]$
$R(p)=700p^{1-0.284}$
$ R(p)=700p^{0.716}\qquad$ million dollars/year
If p=70,
$R(70)=700(70)^{0.716}\approx 14,661.8319241$
$\approx 14.66$ billion dollars/year