Certain chemotherapy dosages depend on a patient's surface area. According to the Gehan and George model, S =0.02235 0.42246 0.51456 , where h is the patient's height in centimeters, w is his or her weight in kilograms, and S is the approximation to his or her surface area in square meters. Joanne is 180 cm tall and weighs 90 kg. Use a differential to estimate how much her surface area changes after her weight decreases by 3 kg. . . . Joanne's surface area changes by approximately (Round to five decimal places as needed.) /1) /1) 0.83/1) 0/1) (0/1)