If Jim increases his daily distance to 15 km, how much total distance would he run in 8 days?

To find the total distance that Jim would run in 8 days after increasing his daily distance to 15 km, you multiply the daily distance by the number of days he runs.

The calculation is straightforward:

15 km/day × 8 days = 120 km.

This means that if Jim runs 15 kilometers each day for 8 days, his total distance covered will be 120 kilometers. This correctly reflects the increase in his daily distance and provides the total for the specified duration. Thus, the answer of 120 km is accurate as it represents the product of his daily distance and the number of days ran.