PLEASE HELP! Which of the following situations can be modeled with an exponential function?

a.) The number of fish in a tank increases by five per month.
b.) The number of people in a city increases by 100 every year.
c.) The value of a car at the end of a year is 8 percent less than the value at the beginning of the year.
d.) The value of a phone drops $100 per year.

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.)