question_answer

If the temperature of city A is \[-\,20\,\,{}^\circ C\] and the temperature of city B is \[10\,\,{}^\circ C,\] what is the difference in temperatures of cities A & B?

A)  \[-\,30\,{}^\circ C\]       

B)         \[-\,\,10\,\,{}^\circ C\]

C)  \[10\,\,{}^\circ C\]         

D)         \[30\,\,{}^\circ C\]