5 athletes are in a 100k race. How many different ways can they finish based on their order.

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .

Solving algebraic equations 2m+3=11

Which two undefined geometric terms always describe figures with no beginning or end?