You are a scientist working on geological dig. you discover a rock layer that contains 50 grams of a substance known to have a half life of 50,000 years. 50% of the substance is parent material and 50% of the substance is daughter material. how old is the rock layer in which you found this substance?

Which of the following initial observations would more directly lead to this research study? a) ginko biloba is cost effective and also possesses heart-protective, antioxidant, anti-inflammatory properties. b) metformin is an effective treatment of patients with t2d, but shows side effects that complicate the disease state. c) over the past several years, the cost of treating t2d within the united states has increased dramatically. d) many plants contain molecules that improve the health and quality of life of patients with a variety of diseases like t2d. e) t2d affects millions of individuals in the usa and worldwide many of who could benefit from improved therapies.