28. Health Donnell is allergic to pollen. The diameter of a grain of pollen is between 1.2 x 10-5 m and 9 x 10-5 m. Donnell's
air conditioner has a filter that removes particles larger than
3 x 10-7m. Will the filter remove pollen? Explain.

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.