A student measures the level of radiation emitted by a radioactive sample.
The table shows the readings she records on the counter over a short period of time.
The sample is removed and the counter then shows a background radiation reading of 4 counts per minute.
What is the best estimate for the average count rate due to the radioactive sample?
96 counts per minute
2 )
98 counts per minute
3 )
100 counts per minute
4 )
104 counts per minute
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