Solve half-life problems
9th grade (Year 10 in England) · 16 questions · Common Core: HSF.LE.A.2, HSF.LE.B.5 · England: GCSE Higher Algebra
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Question 1
A 608 mg sample decays to 19 mg in 40 days. What is its half-life in days?
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Question 2
The half-life of caffeine in the body is 9 hours. Starting with 96 mg, how much is left after 18 hours?
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Question 3
A 224 mg sample decays to 7 mg in 35 days. What is its half-life in days?
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Question 4
The half-life of caffeine in the body is 9 hours. Starting with 8 mg, how much is left after 9 hours?
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Question 5
A 208 mg sample decays to 13 mg in 20 days. What is its half-life in days?
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Question 6
The half-life of a medicine in the blood is 7 hours. Starting with 88 mg, how much is left after 21 hours?
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Question 7
A 28 mg sample decays to 7 mg in 16 days. What is its half-life in days?
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Question 8
The half-life of a radioactive sample is 9 hours. Starting with 56 g, how much is left after 27 hours?
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Question 9
A 160 mg sample decays to 20 mg in 9 days. What is its half-life in days?
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Question 10
The half-life of a medicine in the blood is 9 hours. Starting with 160 mg, how much is left after 36 hours?
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Question 11
A 192 mg sample decays to 6 mg in 45 days. What is its half-life in days?
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Question 12
The half-life of caffeine in the body is 3 hours. Starting with 416 mg, how much is left after 15 hours?
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Question 13
A 48 mg sample decays to 3 mg in 8 days. What is its half-life in days?
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Question 14
The half-life of a radioactive sample is 11 hours. Starting with 192 g, how much is left after 55 hours?
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Question 15
A 32 mg sample decays to 2 mg in 36 days. What is its half-life in days?
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Question 16
The half-life of a medicine in the blood is 5 hours. Starting with 400 mg, how much is left after 20 hours?
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