If a rat is 2.5 years old how the in human years?

The average lifespan of a rat is 2-3 years, so a 2.5-year-old rat would be considered quite old. To calculate the equivalent age in human years, you can use the following formula:

Rat years = (Human years)^3 / 25

Plugging in the given age of the rat (2.5 years), we get:

Rat years = (2.5)^3 / 25

Rat years ≈ 14 human years

Therefore, a 2.5-year-old rat would be approximately equivalent to a 14-year-old human in terms of age-related development and physiological changes.