Answer:
44.55
Step-by-step explanation:
I actually didn't get the right answer and I just edited it right now I'm sorry I dont have an explanation!
The slope is 2 because remember, y= mx+b
m= slope
the slope is always multiplied by x
The equation is separable, so solving it is trivial:

Integrating both sides gives

Given
and
, we find


so the answer is E.
The answer would be 240 since you are only looking for surface area, which means you wouldn’t include the width