Final answer:
The dump truck will have to make 6 trips to haul the customer's load away.
Step-by-step explanation:
To calculate the number of trips the dump truck will have to make, we need to divide the total volume of rock and soil by the capacity of the dump truck. Let's assume the capacity of the dump truck is 6 m³. Dividing 31.8 m³ by 6 m³ gives us approximately 5.3 trips.To calculate the number of trips the dump truck will have to make to haul a customer's load of 31.8 m³ of rock and soil, we need to know the capacity of the dump truck in cubic meters per trip. This information is not provided in the question, making it impossible to give an accurate answer. However, if we had the capacity of the dump truck, the calculation would involve dividing the total volume of the material to be moved (31.8 m³) by the volume capacity of the truck, and then rounding up to the nearest whole number, as a truck can't make a fraction of a trip.
Since we can't have a fraction of a trip, we round up to the nearest whole number. Therefore, the dump truck will have to make 6 trips to haul the customer's load away.