8. If s(t) = 4t +1 is a measure of feet traveled with t measured in seconds, find a. the average velocity between t = 1 and t = 5 b. the instantaneous velocity at t = 2 seconds 9. If s(t) = 12 + 4 is a measure of feet traveled with t measured in seconds, find a. the average velocity between t = 0 and t = 4 b. the instantaneous velocity at t = 1 second 10. If s(t) = 12 - 31+ 2 is a measure of miles traveled with t measured in hours, find a. the average velocity between t = 0 and t=4 b. the instantaneous velocity at t = 1 hour New 1. If s(t) =+ +t-1 is a measure of meters traveled with t measured in seconds, find a. the average velocity between t = 2 and t =7 b. the instantaneous velocity at t = 2 seconds 12. If s ( t ) = - 6 - is a measure of feet traveled with t measured in seconds, find t+ 2 a. the average velocity between t = 1 and t =7 b. the instantaneous velocity at t = 4 seconds