It will take 13.33 days to fill it to 6,000 gallons.
The answer is 69
(2)^2 + 2(5)^2 +15
4 + 50 + 15
69
(4.5 x 10⁹ miles) / (9.5 years) = <em>473,684,211 miles per year</em> (average, rounded)
(That's<em> 54,038 miles per hour</em>, average, rounded)
