Question

Harriet is comparing the costs of calling cards. To use card A, the cost is $1.00 to connect and then $0.04 per minute. To use card B, it costs $0.65 to connect and then $0.06 per minute. For what number of minutes does it cost the same amount to use each card for a single call

Answer 1

Answer: 17.5

This was a question on a test I had(:

Answer 2

Let, the number of that minute = x
It would be: 1 + 0.04x = 0.65 + 0.06x
1 - 0.65 = 0.06x - 0.04x
0.35 = 0.02x
x = 0.35/0.02
x = 17.5

In short, Your Answer would be 17.5 min

Hope this helps!