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→Finding Half Life and Count Rate from a Table
{| class="wikitable"
| style="height:20px; width:100px; text-align:center;" |Time /s
| style="height:20px; width:25px50px; text-align:center;" |0
| style="height:20px; width:50px; text-align:center;" |10
| style="height:20px; width:50px; text-align:center;" |20
|-
| style="height:20px; width:100px; text-align:center;" |Count rate /Bq
| style="height:20px; width:25px50px; text-align:center;" |1000
| style="height:20px; width:50px; text-align:center;" |707
| style="height:20px; width:50px; text-align:center;" |500