3. An adult can take 400 mg of ibuprofen. Each hour, the amount of ibuprofen decreases by 25%. How much ibuprofen is left in the system after 6 hours?

Question

Mathematics

Brady

10 May, 21:30

3. An adult can take 400 mg of ibuprofen. Each hour, the amount of ibuprofen decreases by 25%. How much ibuprofen is left in the system after 6 hours?

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Answers (1)

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Pablo Brock · Answer 1

Answer: 71.2 mg

Step-by-step explanation:

A = P (1 - r) ⁿ where:

P is the initial amount r is the rate of decrease n is the time

A = 400 (1 - 0.25) ⁶

= 400 (0.75) ⁶

= 400 (0.178)

= 71.2