Ef bisects ac , ac bisects ef and gi bisects ad. ad=5x and cd=2x+27 what is ab

Anyone know? is appreciated! will mark brainliest if correct!

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

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?