To determine who proposed the best solution, we need to compare the estimates given by each person and see which one is the closest to 10.
Rosa proposed using 9 and 25 to estimate. We can find the average of these two numbers by adding them together and dividing by 2:
(9 + 25) / 2 = 34 / 2 = 17
Roberto proposed using 4 and 9 to estimate. Again, we find the average:
(4 + 9) / 2 = 13 / 2 = 6.5
Andrea proposed using 11 and 12 to estimate. Once again, we find the average:
(11 + 12) / 2 = 23 / 2 = 11.5
Inno proposed using 9 and 16 to estimate. Find the average:
(9 + 16) / 2 = 25 / 2 = 12.5
Now, let's compare these estimates to the number 10. We need to see which estimate is closest to 10:
- Rosa's estimate: 17
- Roberto's estimate: 6.5
- Andrea's estimate: 11.5
- Inno's estimate: 12.5
Out of these options, Andrea proposed the estimate of 11.5, which is the closest to 10. Therefore, Andrea has proposed the best solution.