Write the ratio as a fraction in simplest form, with whole numbers in the numerator and denominator. 45 : 63

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

Ill mark the brainliest if you me with the these three questions 7,8,9

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?