You have a sample that contains 35 grams of Uranium-235 and 525 grams of Lead-207. Uranium-235 has a half life of 713 m. y. How old is the sample?

Which identifies the main purpose of biological taxonomy? classify organisms by using common names for easy identification of species by scientists create phylogenetic trees that organize species based only on physical characteristics use a systematic method to name, organize, and show relationships among species createwhich identifies the main purpose of biological taxonomy? classify organisms by using common names for easy identification of species by scientists create phylogenetic trees that organize species based only on physical characteristics use a systematic method to name, organize, and show relationships among species create common names that can be applied to multiple organisms found in different regionscommon names that can be applied to multiple organisms found in different regions