The rate of U.S. per capita sales of bottled water for the period 2000-2010 could be approximated by

Question

s(t) = −0.18t2 + 3t + 15 gallons per year (0 ≤ t ≤ 10),
where t is time in years since the start of 2000. Use a Riemann sum with n = 5 to estimate the total U.S. per capita sales of bottled water from the start of 2001 to the start of 2006.