The brain mass of a human fetus during a particular trimester can be accurately estimated from the circumference of the head by m(c) = . 100 circumference (in centimeters) of the head. a. Estimate the brain mass of a fetus that has a head circumference of 29 cm. b. Find the rate of change of the brain mass for a fetus that has a head circumference of 29 cm and interpret your result. 3 a. The brain mass of a fetus that has a head circumference of 29 cm is about g. (Type an integer or decimal rounded to two decimal places as needed.) 1500 C 1 where m(c) is the mass of the brain (in grams) and c is the