Suppose that we want to decide whether a newly developed gasoline additive increases gas mileage. Experimental design:A. Randomly select 20 cars, with 10 cars driven with additive and 10 cars without additive;B. 10 cars are selected at random and the 10 cars are driven both with and without the additive.

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

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.)

Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.