Delta x = (b - a)/n delta x = (16 - 0)/8 delta x = 2 right-hand riemann sum = 2(2.1 + 1.9 + 2.3 + 2.4 + 2.7 + 2.9 + 3.1 + 4.5) = 2(21.9) = 43.8 i am told that s(t) is in "thousands of gallons per hour," and t is only in minutes, so i suspect that 43.8 is not the end of this problem. should i understand this as 43.8 thousand gallons, or does something else need to be done?