In the 1930s, the biologist Max Kleiber studied animals' metabolic rates. He r1 expressed the ratio of the rates for two animals by the relation where r1 and 2 are the animals' metabolic rates and m1 and m2 are the animals' masses. a) Compare the metabolic rates of a 70-kg man and a 15-kg dog. b) Compare the metabolic rates of a 5-kg cat with that of a 50-g mouse. c) Compare the metabolic rates of a 10-g hummingbird and a 5000-kg elephant.

In the 1930s, the biologist Max Kleiber studied animals' metabolic rates. He r1 expressed the ratio of the rates for two animals by the relation where r1 and 2 are the animals' metabolic rates and m1 and m2 are the animals' masses. a) Compare the metabolic rates of a 70-kg man and a 15-kg dog. b) Compare the metabolic rates of a 5-kg cat with that of a 50-g mouse. c) Compare the metabolic rates of a 10-g hummingbird and a 5000-kg elephant.