Final answer:
Big Phone Company offers the better deal with a total cost of $0.51 compared to $0.53 for Little Phone Company.
Step-by-step explanation:
To determine which phone company offers the better deal, we need to compare the total cost for a phone call that takes at least four minutes. For Big Phone Company, the total cost would be $0.39 + ($0.03 imes 4) = $0.39 + $0.12 = $0.51. For Little Phone Company, the total cost would be $0.25 + ($0.07 imes 4) = $0.25 + $0.28 = $0.53. Therefore, Big Phone Company offers the better deal as it has a lower total cost of $0.51 compared to $0.53 for Little Phone Company.