It depends on what level or what school they're in. Like in high school I don't think it would matter much but if you're in college and you wanna do a good profession like medicine or technology or something it would matter and affect their career because they might actually suck at it and be using someone's work and well I'm pretty sure they would get fired or something lol
You press the bar that tells/ask you to aswer it and you type the answer in and in the right top corner a green icon says "Add your Answer" and thats it.