For the final text we guessed based on previous trials that the mystery mass was in the heavier weight bracket. We then ran a the trial and got a time of 8.83 seconds with the .75 meter radius. In trying to be as exact as possible when ran it two more times and got a time of 8.68 seconds and 8.67 seconds, the average time came out to 8.72 seconds. We plugged that in the line of regression and got a weight of 629.362 grams. The real weight of the mystery mass was 618 grams, we had only 1% error.