Question: A computer analysis of an experiment showed that the fraction f of viruses surviving X-ray dosages was given by where d is the dosage. Express

A computer analysis of an experiment showed that the fraction f of viruses surviving X-ray dosages was given by

f = 20 d+3d + 400


where d is the dosage. Express this with the denominator rationalized.

f = 20 d+3d + 400

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