The top of an offshore oil rig has an elevation of 199.2 meters and its base has an elevation of -9.6 meters. an observation deck is located at an elevation equal to of the total height of the oil rig. a helipad is located 22.8 meters above the observation deck. what is the elevation of the helipad?

a.

54.4 meters

b.

56 meters

c.

52 meters

d.

57.6 meters

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