Final answer:
The correct answer is (B) 3.5 gallons. By multiplying 64 ounces of water by 7 days, and then dividing by 128 ounces per gallon, we find that a healthy adult will consume 3.5 gallons of water in a week.
Step-by-step explanation:
To calculate the amount of water in gallons consumed in a week by a healthy adult following the recommendation of 64 ounces per day, we need to perform a series of conversions. First, we find the weekly intake in ounces, and then we convert ounces to gallons, knowing there are 128 ounces in a gallon. To find out how many gallons of water will be consumed in a week by a person who follows the recommendation of drinking 64 ounces of water each day, we need to multiply the number of ounces by the number of days in a week. There are 128 ounces in a gallon, so 64 ounces is equal to 0.5 gallons. Therefore, a person who drinks 64 ounces of water each day will consume 3.5 gallons of water in a week.
Weekly water intake in ounces = 64 ounces/day × 7 days/week = 448 ounces/week
Weekly water intake in gallons = 448 ounces / 128 ounces/gallon
After dividing 448 by 128, we get 3.5 gallons of water consumed in a week.