The phone company charges 10 cents to connect a call for one minute and 8 cents per minute after that. How long could you talk o

Question

frez [133]

3 years ago

5

The phone company charges 10 cents to connect a call for one minute and 8 cents per minute after that. How long could you talk o

n the phone for 1 dollar?

Mathematics

1 answer:

Lunna [17] · Answer 1 · 2022-05-26T15:33:20+03:00

<span>The phone company charges 10 cents to connect a call for one minute and 8 cents per minute after that.
We call x minute to talk after the first minute.
We have 10+8x</span>≤100 (cents)
and 8x≤100-10
or 8x≤90 and x≤90:8
and x≤11.25
So: <span>How long could you talk on the phone for 1 dollar: it is 11 minute and 15 seconds</span>