What is the probability of getting a head with the flip of a coin?

a) 0/2

b)1/4

c)1/2

d)2/2

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.