The half-life of a radioactive substance is the amount of time it takes for half of the

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The half-life of a radioactive substance is the amount of time it takes for half of the substance to decay. The table below shows the time (in years) and the amount of substance left for a certain radioactive substance.

How much of the original amount of the substance, to the nearest whole gram, will remain after 140 years?
A) 85
B) 75
C) 53
D) 38

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Question Posted: Jul 31, 2023 06:43 AM

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The half-life of a radioactive substance is the amount of time it takes for half of the

Question:

Time (years) Amount (grams) 0 14 28 42 56 1.200 850 600 425 300

Step by Step Answer:

D The table shows that onehalf of the substance decays every 28 years Therefore the ha...View the full answer

Acing The New SAT Math

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