To find the final temperature of Bob's solution, you need to add the change in temperature to the initial temperature.
The initial temperature is \( -2^\circ C \), and the change in temperature is \( -6^\circ C \).
Calculating the final temperature:
\[ \text{Final Temperature} = \text{Initial Temperature} + \text{Change in Temperature} \] \[ \text{Final Temperature} = -2^\circ C + (-6^\circ C) \] \[ \text{Final Temperature} = -2^\circ C - 6^\circ C \] \[ \text{Final Temperature} = -8^\circ C \]
So, the final temperature of Bob's solution is \( -8^\circ C \).