(1 point) From the textbook: The circulation time of a mammal (that is, the average time it takes for all the blood in the body to circulate once and return to the heart) is proportional to the fourth root of the body mass of the mammal. Let the circulation time be Y and the body mass be x. (a) If an elephant of body mass 5100 kilograms has a circulation time of 144 seconds, find the constant of proportionality. Answer equation editorEquation Editor (b) Write a formula for the circulation time in terms of body mass. Y(x)