Final answer:
The trainers will spend 3 hours performing 6 shows today, as they perform at a rate of 2 shows per hour.
Step-by-step explanation:
The trainers at Atlantis Aquarium performed shows at the rate of 4 shows in 2 hours yesterday. This gives us a rate of 2 shows per hour. If today they will perform 6 shows at the same rate, we can calculate the number of hours needed by dividing the total shows by the rate. So, we will divide 6 shows by 2 shows per hour, which results in 3 hours needed to perform all shows today.
To see this mathematically, the calculation would be: 6 shows ÷ 2 shows/hour = 3 hours.