6 An on-line science website states:
'To find a dog's equivalent human age in years, multiply the natural logarithm of the dog's age in years by 16 then add 31.'
6
- Calculate the equivalent age to the nearest human year of a dog aged 5 years.
6
- A dog's equivalent age in human years is 40 years. Find the dog's actual age to the nearest month.
6 - Explain why the behaviour of the natural logarithm for values close to zero means that the formula given on the website cannot be true for very young dogs.