The brain mass of a fetus can be estimated using the total mass of the fetus by the function b= 0.22m.o, where m is the mass of the fetus (in grams) and b is the brain mass (in grams). Suppose the brain mass of a 20-g fetus is dm changing at a rate of 0.23 g per day. Use this to estimate the rate of change of the total mass of the fetus, dt dm g per day dt (Round to five decimal places as needed.)

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