In a given city, the permissible limit of co (carbon monoxide) in the air is 100 parts per million (ppm). the city monitors the steady rise of co from various sources annually. in which year (rounded off to the nearest integer) will the co level exceed the permissible limit?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

(1 point) match the differential equations and their vector valued function solutions. you may wish to multiply at least one solution out fully, to make sure that you know how to do it. you can get the other answers quickly by process of elimination and just multiply out one row element.

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians?