How many eight-ounce glasses of water should a person who weighs 144 pounds drink each day?

To determine the number of eight-ounce glasses of water a person should drink each day, a common guideline is to drink half an ounce to an ounce of water for every pound of body weight. In this case, for someone who weighs 144 pounds, this translates to:

• At the lower end (half an ounce per pound): 144 pounds x 0.5 ounces = 72 ounces

• At the higher end (one ounce per pound): 144 pounds x 1 ounce = 144 ounces

Next, we need to convert the daily water intake into glasses of eight ounces each. If we take the lower end of the estimation (72 ounces), dividing this by the eight ounces per glass gives:

72 ounces / 8 ounces per glass = 9 glasses

This calculation explains why the correct answer is nine, as it aligns with the recommended water intake for someone of that weight. This guideline helps ensure proper hydration for optimal body function, but individual needs can vary based on factors such as temperature, activity level, and overall health.