carmenalmuina carmenalmuina

07-09-2016
Mathematics

contestada

A tumor in a rat responds to a new radiation treatment by shrinking 5% with each treatment. How many treatments before the tumor has shrunk to a quarter of its original size?

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Ganstalova Ganstalova

07-09-2016

a quarter is 25% so 5x5 equals 25 so that means in 5 treatments it will have shrunk to a quarter

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