Problema Solution
The first bank charges $2.00 a month plus $.07 per check. The second bank charges $2.25 a month plus $.06 per check. How many checks must you write to pay less at the second bank?
Answer provided by our tutors
bank 1: 2+.07c
bank 2: 2.25+..06c
set bank 2 < bank 1, solve for c
2.25 +.06c < 2 + .07c
.25 + .06c < .07c
.25 < .01c
25 < c
therefore, you need to write more than 25 checks to pay less at the secon bank