Record number on chart. Replace "decayed atoms" with paper ... Determine a theoretical age for the shoe-box specimen: If each trial represents 1,000 years, what is the isotope's half-life in ...

The BP reference data include the 50th, 90th, 95th, and 99th percentiles for age and height for both boys and girls. So the graphs on this page show the ... are below the 90th percentile. The systolic ...