Express 5^3as a logarithmic equation. A. log5^3= x
B. log3 ^5 = x
C. log3^x = 5
D. log5^x = 3

Really need on these. i have no idea what to do

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.)

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)