What body systems work together whenever you get a cut on your finger? A. Reproductive and skeletal system
B. Circulatory system and immune system
C. Circulatory system and digestive system
D. Digestive system and nervous system

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.