+0  
 
+1
31
1
avatar

One prepaid cell phone company charges $0.029 per minute and a $4 monthly fee. Another company charges $0.034 per minute with no monthly fee. For what number of minutes per month are the charges for the first company cheaper?

Guest Oct 19, 2018
 #1
avatar+90968 
+3

We want to solve this inequality

 

Total cost of 1st company < Total cost of second company

 

.029 N +  4  < .034N      where N is the number of minutes we are looking for

 

subtract  ,029N from both sides

 

4 < .005N    divide each side by .005N

 

4 / .005  < N

 

800 < N

 

The first company will be cheaper after 800  minutes

 

 

cool cool cool

CPhill  Oct 19, 2018

30 Online Users

avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.