Question

in a polluted marsh, has a known doubling time of 35 years.
\frac{70}{r (growth rate)} = doubling time
choose the correct answer.
which species is growing faster based on the rule of 70?
both double in 35 years
species b, doubling in 35 years
species a, doubling in 14 years

Explanation:

Step1: Understand the Rule of 70

The Rule of 70 states that $\frac{70}{r}=\text{Doubling Time}$, where $r$ is the growth - rate. A smaller doubling time implies a higher growth rate.

Step2: Analyze the given doubling times

Species A has a doubling time of 14 years and species B has a doubling time of 35 years. Since 14 < 35, species A doubles faster.

Answer:

species A, doubling in 14 years