Alexandra is scuba diving. Every 5 minutes an alarm goes off, and she checks her instruments and makes note of her depth. The depth readings from her first 20 minutes of diving are shown in the table below. Elapsed time (in minutes) Depth (in meters) 0 0 5 - 12.45 10 - 9.7 15 - 22.98 20 - 6.6 Which best represents the greatest amount of change in her depth over a single 5-minute period? - 16.38 meters - 13.28 meters 13.28 meters 16.38 meters

Question

Alfie

Mathematics

23 August, 08:26

Alexandra is scuba diving. Every 5 minutes an alarm goes off, and she checks her instruments and makes note of her depth. The depth readings from her first 20 minutes of diving are shown in the table below. Elapsed time (in minutes) Depth (in meters) 0 0 5 - 12.45 10 - 9.7 15 - 22.98 20 - 6.6 Which best represents the greatest amount of change in her depth over a single 5-minute period? - 16.38 meters - 13.28 meters 13.28 meters 16.38 meters

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Danna Weber · Answer 1

The correct answer is 16.38 meters. The reason is that from - 22.98 to - 6.6 was the biggest difference in elevation. The change is a positive value because Alexandra moved up from one to the other.

9.7 should say - 9.7 because these are distances under the water.