An element with a mass of 700 grams decays by 6.1% per minute. To the nearest tenth of a minute, how long will it be until there are 220 grams of the element remaining?

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asked Sep 18, 2022 206k views

2 votes

An element with a mass of 700 grams decays by 6.1% per minute. To

the nearest tenth of a minute, how long will it be until there are 220
grams of the element remaining?

Mathematics
college

William Cheng asked

by William Cheng

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2 Answers

5 votes

Answer: the answer would be 18.4 minutes

Explanation:

Alborz answered Sep 19, 2022

by Alborz

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4 votes

Answer

m =18.4 minutes

Explanation:

220 = 700 x (0.939)^m

220/700 = (0.939)^m

m = Log(220/700) / Log(0.939)

m =18.4 minutes

Laticha answered Sep 22, 2022

by Laticha

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