A chemist begins studying a radioactive sample that has a mass of 450 grams.
sample decays at a rate of 6.7% each week. How much of the sample is left in
weeks? Round your answer to 2 decimal places.
A)287.74
B)301.19
C)332.06
D)318.14

The question should say How much of the sample is left inFIVEweeks? At least that is what I think you want to know.

The answer is 318.13 grams.

Step-by-step explanation:

450 - 6.7% = 419.85 grams End of week 1

419.85 - 6.7% = 391.72 grams End of week 2

391.72 - 6.7% = 365.47 grams End of week 3

365.47 - 6.7% = 340.98 grams End of week 4

340.98 - 6.7% = 318.13 grams End of week 5

step-by-step explanation:

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