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4. [-/2 Points] DETAILS SCALCET9 5.1.009.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 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 (s) 0 0.5 1.0 1.5 2. 2.5 3.0 v (ft/s) 6.7 11.2 14.1 18.8 19.8 20 lower upper ft Need Help? Read It Watch It Master It 5. [-/2 Points] DETAILS SCALCET9 5.1.011.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Oil leaked from a tank at a rate of r(t) liters per hour. The rate decreased as time passed, and values of the rate at two-hour time intervals are shown in the table t (h) 0 2 4 6 8 10 r(t) (L/h) 8.8 6.9 6.4 5.6 5.1 Find lower and upper estimates for the total amount of oil (in liters) that leaked from the tank over the interval [0, 10]. (Use five equal subintervals.) lower estimate upper estimate Need Help? Read It Watch It Master It 6. [-/1 Points] DETAILS SCALCET9 5.1.013. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The graph of the velocity of a braking car is shown. v (ft/s) 90 60 30 t (seconds) 2 Use this graph and a midpoint sum with six equal subintervals to estimate the distance traveled (in feet) by the car while the brakes are applied. ft Need Help? Read It Watch It