Final answer:
The variable t represents Brian's daily exercise time in minutes, and the inequality t ≥ 35 denotes that Brian exercises no less than 35 minutes per day.
Step-by-step explanation:
Brian exercises for no less than 35 minutes per day. To represent Brian's amount of exercise mathematically, we can use the variable t to indicate the time he exercises daily in minutes. The inequality that represents this situation is t ≥ 35, meaning that the amount of time, t, Brian spends on exercise is 35 minutes or more each day. This falls well within the physical activity recommendations that suggest engaging in at least 30 minutes of physical activity most days of the week to reap various health benefits.