A 15 ft. ladder leans against a wall. The foot of the ladder if 5 ft. from the bottom
of the wall. What angle does the ladder
make with the ground?
A. 18
B. 72
C. 71
D. 19

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.