Find the area of the regular polygon. Give the answer to the nearest tenth. Decagon with a side of 4 cm.

a) 129.4 cm squared
b) 246.2 cm squared
c) 123.1 cm squared
d) 139.8 cm squared

7x+8y=-18, 4x-9y=-3 solve the system of equations

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.)

Acircle has a circumference of 28.36 units what is the diameter of the circle