Which of the following represents the expression A to the power of 6 times A to the power of −9 written in simplest form? A)
1/A to the 3rd power

B)
1/ a to the 6−9 power

C)
a to the −3 power

D)
a to the 3rd power

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.