Question

A biologist is researching the population density of lizards near a boulder in a desert. The biologist

counts 15 lizards within a radius of 1/4 mi of the boulder.
What is the population density of lizards?
Enter your answer in the box. Use 3.14 for pi and round only your final answer to the nearest
whole number
lizards/mi?

Answer 1

76

Explanation:

Use .25 to represent the 1/4 of a mile.

Since it is a given radius around the boulder, we would treat it as such and find the area of the circle around the boulder.

To do this, you do .25² * 3.14

.0625 * 3.14 = .19625

15/.19625 = 76 and some change, but you need to round down to 76

Answer is 76.