I monitor the amount of battery left on my computer so I can make sure it doesn't die at the wrong time. My battery loses charge at a constant rate.

This graph shows the percent of charge left on my computer, c, after I have been awake for h hours.

What was the percent charge when I woke up?

90%

Step-by-step explanation:

This makes the most since, c started at 90, so it was likely when the person woke up.

90%

Step-by-step explanation:

The graph show the percent charge c, after the person have been awake for h hours.

If the person just woke up, then they have been awake for precisely 0 hours. Therefore, h = 0.

Then according to the graph, when h = 0, c = 90.

So, the percent charge of the computer is at 90% when the person awoke.

b

step-by-step explanation:

the word superfluous means unnecessary