What is the average change in field position per running play ?

Caleb and emily are standing 100 yards from each other. caleb looks up at a 45° angle to see a hot air balloon. emily looks up at a 60° angle to see the same hot air balloon. approximately how far is the hot air balloon off the ground? a)44.2 yd. b)63.4 yd. c)73.2 yd. d)89.7 yd.

Select the two binomials that are factors of this trinomial x^20 - x - 20

Could someone give me some steps on how to solve piecewise functions?