At noon a plane departed St. Louis, Missouri, for Los Angeles 2100 kilometers away flying at an average speed of 450 kilometers
per hour. One hour later a jet left
Los Angeles for St. Louis averaging 650 km/h. At what time did they pass each other?

i believe it's a.

i'm not sure on this one, most likely correct.

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

ya

answer is c

step-by-step explanation: