How to convert binary to a decimal (denary)

Which of the following is a way the operating system prevents unknown or unauthorized users from accessing the system?

Me dangers of social media and the internetexplain what each means: 1) social media and phones have become an addiction.2) outside people have access to you all the time.3) cyberstalking4) cyberbullying5) catphishing6) viruses7) identity theft8) credit card fraud9) hacking10) money schemes

Which of the following is not an enhancement to the standard wiki to make it more attractive for corporations? encryptionwork spacespermission toolspredictive text