How long will it take for 475 mg of a sample of radium-225, which has a half-life of about 15 days, to decay to 30 mg? A)50 B)52 C)58 D)60

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DamonJW asked Aug 25, 2023

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How long will it take for 475 mg of a sample of radium-225, which has a half-life of about 15 days, to decay to 30 mg?

A)50
B)52
C)58
D)60

Mathematics
high-school

DamonJW asked Aug 25, 2023

by DamonJW

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2 Answers

14 votes

Answer:50

Step-by-step explanation

It would take exactly

475-225 = 250 - 215 = 35 + 15 = ( 50 )

Mikolaytis answered Aug 28, 2023

by Mikolaytis

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23 votes

Answer:

The actual answer is 60.

Explanation:

JohanVdR answered Aug 30, 2023

by JohanVdR

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