Final answer:
John recorded the temperature dropping by -2.4°C each hour for 4 hours. To calculate the total drop, we multiply -2.4°C by 4 hours, resulting in a total temperature drop of -9.6°C.
Step-by-step explanation:
John is measuring the temperature, which is currently 4°C at 6:00 pm. The temperature dropped by -2.4°C each hour for 4 hours. To find out how much the temperature dropped in 4 hours, we multiply the hourly temperature drop by the number of hours.
Hourly drop = -2.4°C
Number of hours = 4
Total temperature drop = Hourly drop × Number of hours
Total temperature drop = -2.4°C × 4
Total temperature drop = -9.6°C
The integer that represents how much the temperature dropped in 4 hours is -9.6°C, which is option A.