12.23.19 For anyone still needing an answer to this question “How do I get out of safe mode“ for my RCA Viking 10.1 here is the answer according to the Google assistant on my RCA Viking 10.1 And it WORKED !! :
Press & Hold the power button for a few seconds (With your tablet powered up and open)
Your tablet screen will open up with a small menu — press the RESTART option
Your tablet will be out of safe mode!