## pepper0331 3 years ago The telephone company offers two types of service. With plan A, you can make an unlimited number of calls per month for 18.50. With Plan B, you pay \$6.50 monthly, plus 20 cents for each minute of calls after the first 40 min. At least how many min would you have to use the telephone each month to make Plan A the better option?

1. xBreakingBenjaminx

well..you already know its about 20 cents for each minute after 40 min of your call for plan B, so by subtracting 6.50 from 18.50 you get 12.00. so you need to divide 12.00 by 0.20..you do this you get 60 which is the number of minutes you would have to use the telephone each month to make Plan A the better option.

2. pepper0331

sorry i just realized that its supposed to be 10 cents but when i tried it i didn't get the right answer because i looked it up in the back of the book and its 160 but i dnt know how to get that

3. xBreakingBenjaminx

let me rework it..

4. pepper0331

k thanks

5. xBreakingBenjaminx

Okay...I made a boo boo...the question asks how many minutes would you have to use the telephone each month in order to make Plan A better. WELL....12.00 multiplied by 0.10 is 120 minutes....Now add the 40min you already have in the plan...160 min ^^

6. pepper0331

oh thanks!

7. xBreakingBenjaminx

again. ^^ No problem :p

8. pepper0331

wait 12 and .1 is 1.2

9. xBreakingBenjaminx

you have to add the 0 from the end of the 10 cents onto the 1.2...which bumps it up to 120. :p