On a 14-day vacation, Glenn increased his caloric intake

by 1500 calories per day. He also worked out more than
usual by swimming 2 hr a day. Swimming burns 666 calories
per hour, and a net gain of 3500 calories adds 1 lb of
weight. Did Glenn gain at least 1 lb during his vacation?

14 * 1500 = 21,000 additional calories

2 * 666 * 14 = 18,648 calories burned

He ate 2,352 more calories than he burned.

To determine if Glenn gained at least 1 lb during his vacation, we need to calculate the total number of calories he consumed and the number of calories he burned through swimming.

First, we calculate the total number of additional calories Glenn consumed during his vacation: 1500 calories/day * 14 days = 21,000 calories.

Next, we calculate the number of calories he burned through swimming: 2 hours/day * 666 calories/hour * 14 days = 18,648 calories.

Since Glenn burned more calories through swimming than he consumed through the increased intake, we subtract the calories burned from the additional calories consumed: 21,000 calories - 18,648 calories = 2,352 calories.

According to the given information, a net gain of 3500 calories adds 1 lb of weight. Since 2,352 calories is less than 3500 calories, Glenn did not gain at least 1 lb during his vacation.