Mr. brown teaches music to children and is organizing a trek for the students of his class. he has the following breakdown of how much it would cost him per day of the trek. campground rental: $200 per day training cost: $20 per student per day food cost: $30 per student per day miscellaneous expenses: $50 per student per day trekking gear cost: $1,050 (one-time cost) mr. brown's total cost for conducting a 3-day trek with b students is represented by the expression below. which statement best describes the coefficient of b? it is mr. brown's daily cost per student, with training, food, and miscellaneous expenses. it is mr. brown's daily cost per student for campground rental and the trekking gear. it is mr. brown's total 3 day cost per student, with training, food, and miscellaneous expenses. it is mr. brown's total cost per day for campground rental and the trekking gear.