Wouldn't it be d)$80 if not can you explain why

The textbook defines ethics as “the principles of conduct governing an individual or a group,” and specifically as the standards one uses to decide what their conduct should be. to what extent do you believe that what happened at bp (british petrolium) is as much a breakdown in the company’s ethical systems as it is in its safety systems, and how would you defend your conclusion?

Why would an investor invest in your stocks

The answer here, x=7, is not in the interval that you selected in the previous part. what is wrong with the work shown above?