Answer: 22 °C is the temperature in the next 3 hours.
Step-by-step explanation: The temperature is a 5 °C increase per hour. Assuming the temperature increases for 3 hours, 5 °C x 3 = 15 °C, the temperature wuld have risen by 15 °C.
Simply add 15 °C to the original temperature which is 7 °C.
7 °C + 15 °C = 22 °C
