The temperature of a substance is 15°C , and the temperature decreases by 27°C at the beginning of an experiment. If the temperature decreases by another 12°C by the end of the experiment, which statement is true?
a. The temperature at the end of the experiment is -12°C.
b. The temperature at the end of the experiment is equiv π 1°C.
c. The temperature at the end of the experiment is -27°C.
d. The temperature at the end of the experiment is -39°C.
