Which is correct about combining two velocities that are in exact opposite directions? A. The final direction is 90 degrees from either of the original velocities.

B. Only the larger velocity is mentioned.

C. The magnitude of one is subtracted from the magnitude of the other,

D. The larger velocity is divided by the smaller one.

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?