# A sample is dated using uranium-235 (half-life 704,000,000 years) and it has 4 of the original amount of uranium. How old is the sample?

##### 1 Answer

May 3, 2017

#### Answer:

#### Explanation:

note: it is impossible to have a value higher than 1 times the original amount if the sample is dated back, so i'm going to assume that you meant

using this:

meaning