1. What was Swimmer C's average speed? 2. What was Swimmer A's average speed during the period 10 min to 20 min?

4.8 km/hr ;

0

Explanation:

Based on information plotted on the graph :

Distance traveled by swimmer C = 2400 m

Travel time of swimmer C = 30 minutes

Converting distance to km:

2400 m = 2400 / 1000 = 2.4 km

Converting time to hour :

30 minutes = 30 / 60 = 0.5 hour

Average speed = Distance traveled / time taken

Average speed = 2.4 km / 0.5 hour = 4.8 km/hr

2.)

Swimmer A's average speed during the period 10 to 20 minutes ;

Change in distance /change in time

(400 - 400) / (20 - 10) = 0

Hence, distance traveled is 0

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !