Zis less than 2 and equal to or less than 8 intersection

Less than 2 = z < 2

Less than or equal to 8 = z ≤ 8

z ≤ 8

z < 2

414 feet per minute.

Step-by-step explanation:

Given : A snowboarder descends from an elevation of 2253 feet to an elevation of 1011 feet in 3 minutes.

Then, the mean change in elevation per minute is given by :-

Therefore. the mean change in elevation per minute = 414 feet per minute.