In a lab experiment, the decay of a radioactive isotope is being observed. At the

beginning of the first day of the experiment the mass of the substance was 1000

grams and mass was decreasing by 15% per day. Determine the mass of the

radioactive sample at the beginning of the 14th day of the experiment. Round to the

nearest tenth (if necessary).

Question

Mathematics

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2 November, 23:32

In a lab experiment, the decay of a radioactive isotope is being observed. At the

beginning of the first day of the experiment the mass of the substance was 1000

grams and mass was decreasing by 15% per day. Determine the mass of the

radioactive sample at the beginning of the 14th day of the experiment. Round to the

nearest tenth (if necessary).

+4

Answers (1)

Know the Answer?

Drew Todd · Answer 1

Answer: 120.91 grams

Step-by-step explanation:

multiply the initial amount by the percent that will remain to the power of n-1, n being the term number, or how many days that have passed.

f (x) = 1000 (0.85) ^14-1