What pattern you see in the spans graph

What type of commercial speech is not protected by the 1st amendment?

How was the structure of american society different in 1848 than it has been in 1800

Let r(t) represent the rate, in square feet per minute, at which a groundskeeper is mowing a lawn t minutes after 3 p.m. what expression represents the area, in square feet, of the lawn that is mowed between 3 p.m. and 5 p.m.?