The speed of a runner increased steadily during the first three seconds of a race. Her speed at half-second intervals is given in the table. Find lower and upper estimates for the distance (in ft) that she traveled during these three seconds. t (5) 0 0.5 1.0 1.5 2.0 2.5 3.0 v (ft/5) 0 5.7 11.2 15.5 18.8 19.8 20 lower 34.65 X ft upper 44.75 x ft Enhanced Feedback Please try again. To estimate the distance the runner traveled during an interval of time, find an estimate for the area under the velocity graph using rectangles. Since the runner's speed is increasing during the interval, use left endpoints for an underestimate and right endpoints for an overestimate