PLEASE HELP (: The range of the function

f(x) = x + 5 is {7, 9}. What is the function’s domain?

A. {2, 4} B. {-2, -4} C. {12, 14} D. {-12, -14} E. {0, 5}

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

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.)

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?