Estimate the average speed with which the hair on your head grows. Part A Give your answer in m/s. View Available Hint(s) 9.8 10-11 m/s 9.8 10-9 m/s 9.8 107 m/s 9.8 x 10-5 m/s Submit Part B Give your answer in m/hour. View Available Hint(s) O 0.40 um/h 4.0 x 103 um/h O 4.0 x 105 um/h O 40 um/h Submit