## Calculus 8th Edition

a) i) $\frac{79.2−20.6}{4−2}$ ii)$\frac{79.2−46.5}{4−3}$ iii)$\frac{124.8−79.2}{5−4}$ iv)$\frac{176.7−79.2}{6−4}$ b) The answer should be similar to the average velocity between t=2 and t=4, which we found in part (a) (29.3 ft/s). We can graph a tangent line and get a more precise estimate of 29.7 ft/s.