1. American football uses a field that is 100 yd long, whereas a regulation soccer field is 100 m…

1. American football uses a field that is
100 yd long, whereas a regulation soccer field is 100 m long. Which field is
longer, and by how much (give yards, meters, and percent)?

2. A typical adult human lung contains
about 300 million tiny cavities called alveoli. Estimate the average diameter
of a single alveolus.