Question

Please help me I will Mark you brainlist

Answer 1

Answer:

Step-by-step explanation:

Initial tempreature = 50degree C

rate of change in temprature= 7 degree c/ hour

time= 9 hrs

so, in 9 hours the temprature would be decreased by 9*7= 70 degree C

so, final temprature = 50 - 70 = 20 degree C