Answer
$R = 3.92 \times 10^{-9} Ci $
Work Step by Step
$1 \space Ci = 3.70\times 10^{10} Bq $
Taking from previous answer,
$R =\frac{ 145 Bq}{ 3.70\times 10^{10} Bq/ Ci} $
$R = 3.92 \times 10^{-9} Ci $
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