Asnowboarder descends a 1200-foot hill in 3 minutes. what is the mean change in elevation per minute

If you would like to know the mean change in elevation per minute, you can calculate this using the following steps:

1200-foot ... 3 minutes
x-foot = ? ... 1 minute

1200 * 1 = 3 * x
1200 = 3 * x
x = 1200 / 3
x = 400-foot

The correct result would be 400-foot per minute.

You need the internet to you

Well if you have 20 bats you probably want 20 balls? you don’t have enough context to answer the question.