Antonio is on the track team. he ran the 400-meter dash in 1 minute and 20 seconds. the graph shows his performance on the 400-meter hurdles. how much faster was his average speed in the 400-meter dash?

  5/3 m/s

Step-by-step explanation:

Antonio's speed in the 400 m dash was ...

  (400 m)/(80 s) = 5 m/s

Antonio's speed in the hurdles was ...

  (400 m)/(120 s) = 3 1/3 m/s

His speed in the dash was ...

  (5 -3 1/3) m/s = 1 2/3 m/s = 5/3 m/s

faster than in the hurdles.

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step-by-step explanation:

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