To determine the best estimate for 72.15 from the given options, we can look for the number that is closest to 72.15.
- Option #1: 49 (too low)
- Option #2: 75 (very close to 72.15)
- Option #3: 150 (too high)
- Option #4: 343 (much too high)
The closest estimate to 72.15 is Option #2: 75.