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Finger [1]
3 years ago
11

A medicine is decaying at a rate of 5% per hour. If there were initially 1000mg of the medicine, how much is left after 4 hours?

Round to the nearest tenth
(one decimal place)
Write an equation first, then plug in the value 4 for X
Mathematics
1 answer:
Stolb23 [73]3 years ago
8 0

Answer:

  814.5 mg remain after 4 hours

Step-by-step explanation:

The multiplier of the original quantity is 1 -5% = 0.95 for each passing hour. The amount remaining after x hours is ...

  y = 1000·0.95^x

For x=4, the amount remaining is ...

  y = 1000·0.95^4 = 1000·0.81450625

  y ≈ 814.5 . . . mg remain after 4 hours

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Answer:

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Step-by-step explanation:

Given points: (0,-5)  (1,-3)

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