A hike starts at an elevation of 13 and 4 fifths feet below sea level and ends at an elevation that is 1 comma 542 feet higher. How high is the hiker, in feet, above sea level at the end of the hike?

Being 13 and 4 fifths feet below sea level is an elevation of −13 4/5 feet. Add the 1,542-foot gain: 1,542 − 13 4/5 = 1,528 1/5 feet above sea level, which is choice C.

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