AMC8 2023 Problem 9

Malaika is skiing on a mountain. The graph below shows her elevation, in meters, above the base of the mountain as she skis along a trail. In total, how many seconds does she spend at an elevation between 4 and 7 meters?

2023_que_9

Answer Choices
A. 6
B. 8
C. 10
D. 12
E. 14