divide total miles by total time:
60.9 / 3.5 = 17.4 miles per hour
a. The population for the study is a total of 1000 adults, so the 50% that favored the plan made up a total of 500 people, since 500 is 1/2 (or 50%) of 1000.
b. The percentage provided is an inferential statistic. Inferential statistics are made by taking a sample of a population and using that sample as data used to make inferences/predictions. Since the percentage provided is a sample of a population being used to make a prediction, it is an inferential statistic.
I like to use 8 hours of school a day so thats 21 a week but all people are different so at most 36 hours a week