The curve below shows the rate t, in hours, that a tank is leaking. To find the total T amount of material leaked in gallons, estimate the definite integral (v(t)dt, where T 0 is the total number of hours, by adding the areas of rectangles with widths of 1 hour. The height of each rectangle will be the left endpoint of the interval. Rate in gallons per hour 800 700 6000 500 400 300 200 100 E The estimated amount of material leaked after 8 hours is (Round to the nearest hundred as needed.) 0- 0 Elapsed time in hours gal