A cart moves along a straight track. Its speed v(t) in meters per second was measured every 2 seconds, and the results are shown.
Time t (s): 0 2 4 6 8
Speed v(t) (m/s): 3 4 6 5 4
Assuming the speed varies linearly between measurements, calculate the cart’s approximate displacement, in meters, from t=0 to t=8 seconds.