It is recommended that a hiker drink 18 ounces (oz) of water per 2-mile hike in a temperate climate and low-altitude areas. When planning a 7.5-mile hike, how much water should be brought along for one hiker?

This choice may result from misunderstanding the initial water-to-mile ratio. If one were to incorrectly assume that 18 oz of water is needed for a 7.5-mile hike, then scaling this down to a 2-mile hike would yield approximately 4.8 oz. However, this incorrectly reverses the given ratio.

This choice might come from an incorrect calculation where the hiker is presumed to require 18 oz of water for the whole 7.5-mile hike, and then dividing this total by the number of miles (7.5), leading to an erroneous quantity of water per mile.

This choice seems to result from misunderstanding the initial ratio and the nature of the question. If a hiker incorrectly interprets the ratio as needing 18 oz for every 7.5 miles, then the water needed for a 2-mile hike would be approximately 0.83 oz. This choice reflects a misreading of the original given ratio.