Final answer:
To find how far Mr. Rossi drives in a month, we need to know how far he drives in a day. Without that information, we cannot determine the total distance.
Step-by-step explanation:
To find how far Mr. Rossi drives in a month, we need to know how far he drives in a day. Let's assume that Mr. Rossi drives the same distance every day. If he drives a distance of 'd' in a day, then in one month (20 days), he would drive a distance of 20d. However, we need to know the value of 'd' in order to calculate the total distance. Without that information, we cannot determine how far Mr. Rossi drives in a month. Therefore, we would need additional information to answer the question accurately.