It depends on what state you're in. I had to take 130 hrs + 12 hrs ER + 24 hrs ambulance for Missouri.
I'm not sure if the National Registry standardized minimums for certification.
But no way is there a program for only 10 hrs for EMT-B. 10 hrs for first responder maybe.
It's 10 hrs just for CPR and AED training.
LCR