Answer:

Step-by-step explanation:
The domain is the span of x-values covered by the graph.
From the graph, we can see that the x-values covered by the graph is all values to the left of zero including zero.
Therefore, the domain is all x-values less than or equal to 0:

Further notes:
In interval notation, this is:
![(-\infty,0]](https://tex.z-dn.net/?f=%28-%5Cinfty%2C0%5D)
Answer: let the hours they both have equal amount of water be X
130+10x=280-5x
10x+5x=280-130
15x=150
x=10hrs
Step-by-step explanation:
The area of the page = 11.7 x 8.5 = 99.45 square inches
divide the number of word by the area:
375 / 99.45 = 3.77 words per square inch ( round answer as needed)