If a sample analysis yields a ratio of 6.25% parent and 93.75% daughter for a radioactive isotope with half-life of 110,000,000 years, how old is the sample? (type the number only, with commas, round to nearest million)

The us and canadian governments are doing all of the following to combat environmental problems except a. encouraging the use of public transportation b. enacting clean water policies c. requiring emissions testing d. limiting animal populations in some regions