Probably the changes in environment....
Answer:
he walked 7 miles
Explanation:
2+3.000+2.00= 7
you can add with a calculator as well
To determine which object has the greatest acceleration, you would use the formula:
acceleration = (Final Velocity - Initial Velocity) / Time
Just plug-in values for what you have and see which one has the greatest acceleration. If you're given velocity-time graphs, then the one with the steepest slope would have the greatest acceleration.
11.86 years, or around that time it would take about 12 years.