The basal metabolic rate (BMR) of an animal is a measure of the amount of energy it needs for survival. An animal with a larger BMR will need more food to survive. One simple model for the BMR states that among animals of a similar shape, the rate is proportional to the square of the length. If one animal is 5 times as long as another, how much larger is its BMR compared to the smaller animal?
B)5 times
C)10 times
D)25 times

Question

The basal metabolic rate (BMR) of an animal is a measure of the amount of energy it needs for survival. An animal with a larger BMR will need more food to survive. One simple model for the BMR states that among animals of a similar shape, the rate is proportional to the square of the length. If one animal is 5 times as long as another, how much larger is its BMR compared to the smaller animal?
B)5 times 
C)10 times 
D)25 times

Quizplus · Accepted Answer

The BMR is proportional to the square of the length. If one animal is 5 times as long as another, its length is 5 times larger. Therefore, its BMR will be 5^2 = 25 times larger than the smaller animal. So, the correct answer is D.

The Basal Metabolic Rate (BMR) of an Animal Is a Measure