What are the possible rational zeros of f(x)=x^4+2x^3-3x^2-4x+12?

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?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Pls never taught i’m really confused and i rlly need