How would I go about solving this problem

Scenario: You take your car to the garage and find out that there are some mandatory repairs that will take approximately a week. Upon hearing this you call your car insurance company and discover that your insurance does not cover a rental car. You must arrange for a rental as you need reliable transportation to get to class, your job, and other commitments you have throughout the week. A quick internet search shows that Acme rental agency is offering a daily cost of $9 plus $0.25 per mile, while Interstate rental agency is offering a daily cost of $15 plus $0.05 per mile. Which rental company would you choose? In addition to giving a definitive answer to this question, provide the mathematical calculations you used in making your decision and then explain, in a few sentences, why you gave the answer you did. There is not a single correct answer, but the reasoning provided must be correct to support your decision