1. **State the problem:** A truck starts with 98.502 pounds of sand and loses 28.293 pounds during the trip. We need to find how much sand remains when it arrives. 2. **Formula used:** The remaining sand is calculated by subtracting the lost amount from the initial amount: $$\text{Remaining sand} = \text{Initial sand} - \text{Lost sand}$$ 3. **Apply the values:** $$\text{Remaining sand} = 98.502 - 28.293$$ 4. **Perform the subtraction:** $$98.502 - 28.293 = 70.209$$ 5. **Conclusion:** The truck has 70.209 pounds of sand when it arrives at the construction yard.