By READING the $R$ vs $t$ graph shown below, determine $R_0$& the mean life.

$$ decays$/$s

mean life $=$

Part $2$: Half$-$life $($straightforward determination$)$

Part $3$: Half$-$life graph

By READING the $N$ vs t graph shown below, determine $N_0$ & the half$-$life. atnme$)$

$N_0=$

$$ atoms

half$-$life $=9h$