As part of an experiment in the science lab,a thermometer was inserted in a soultion in order to measure the temperature over time. At 9:15 a.m. the temperature was -17°C, and at 11:30 a.m. it was -26 °C. 8°C. 9°C. 11°C. 43° C.
The temperature decreased from -17°C to -26°C over a period of 2 hours and 15 minutes (from 9:15 a.m. to 11:30 a.m.).
To find the rate of change of temperature per hour, we can divide the change in temperature (which is -9°C) by the time elapsed in hours.
Time elapsed = (11:30 a.m. - 9:15 a.m.) = 2 hours and 15 minutes = 2.25 hours
Rate of change of temperature per hour = Change in temperature / Time elapsed
Rate of change of temperature per hour = -9°C / 2.25 hours ≈ -4°C per hour
Therefore, the temperature is decreasing at a rate of approximately 4°C per hour.