Help pls I don’t understand this my teacher didn’t teach this

Kenzie lives 30 kilometers from her cousin houde she drives 23 kilometers before stopping for gas how many meters does she need to travel

What is the smallest integer n such that n\sqrt{2} is greater than 20

Adoctor administers a drug to a 38-kg patient, using a dosage formula of 50 mg/kg/day. assume that the drug is available in a 100 mg per 5 ml suspension or in 500 mg tablets. a. how many tablets should a 38-kg patient take every four hours? b. the suspension with a drop factor of 10 ggt/ml delivers the drug intravenously to the patient over a twelve-hour period. what flow rate should be used in units of ggt/hr? a. the patient should take nothing pills every four hours. (type an integer or decimal rounded to the nearest hundredth as needed.)