At the beginning of an invertigation , a student determines that the temp. of a beaker of water is 99.8+_ 0.1C . At the end of the investigation , the temp. Is 35.5+_ o.1C . What is the change in temp.??

Question

At the beginning of an invertigation , a student determines that the temp. of a beaker of water is 99.8+_  0.1C . At the end of the investigation , the temp. Is 35.5+_ o.1C . What is the change in temp.??

My answer is 64.5+_ 0.2 C . Is this right ?
Thank you!

Henry · Answer

Change = 35.4 - 99.9 = -64.5oC The negative sign means the change was a decrease.