Question 965086
This problem has a little too much information for the initial solving. It is also dealing with fractions of a minute. You get 400 minutes for $35. So you get 400 minutes. With each additional minute you pay $15 extra but $35+15=$50. This is too much for your budget. You have room for $10 or 10/15 or 2/3 of a minute or 40 seconds. Add your 400 minutes and you get the answer of 400 minutes 40 seconds.