Suppose q and r are independent events. find p(q and r) if p(q) = 0.32 and p(r) = 0.19.

Find the length of cu, the triangles are similar.

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Which term describes the point where the perpendicular bisectors of the three sides of a triangle intersect?