First find the length of the larger base. Then, find the sum of all of the sides.
Answer:
[-4,2] or 
Step-by-step explanation:
Range is the range of the y-axis.
Although we see that the "line" ends at a specific point, it is neither the highest or lowest y-value.
Our lowest y value is -4, and because it is a line, it is not an open dot resulting in a [, instead of a (.
This same thing happens with highest y-value which happens to be 2.
This is interval notation.
Due to your question, you may be asking for this:

There is 9 windows left and to finish installing the rest of the windows it will take 45 hours to finish all of the windows in the building