Help ? please and thank you

What is the difference between the predicted value and the actual value

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.