Eugenia wants to find out how fast she walked along the hiking trail that took her 1.5 h to complete. she counted the number of steps with a pedometer and got 1 steps. in order to calculate the distance she walked she estimated the length of her stride. she walked 10 steps three times at her usual rate and measured the distance with a measuring tape (the smallest division is 1cm) and got 745cm, 748 cm, 739 cm. find the length of her stride. what is the length of the hiking trail? what are absolute and relative uncertainties in that length?