Question

when is it better to use the card from company B? ,, company A- 0.35 plus 0.3 per minute, company B- 0.45 plus 0.2 per minute

Answer 1

0.35 + 0.3x > 0.45 + 0.2x
0.3x - 0.2x > 0.45 - 0.35
0.1x > 0.1
x > 1...so it is better to use B when ur talking for more then 1 minute