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gulaghasi [49]
3 years ago
15

What does p equal when 4p^2+121-44p=0

Mathematics
1 answer:
Scrat [10]3 years ago
6 0
You can write this (2p-11)^2=0
So answer is 11/2
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A certain prescription drug diminishes in the system at a rate of 25% per hour. If a person was administered 1450mg of the drug,
Helen [10]

9514 1404 393

Answer:

  • 459 mg
  • about 20 hours

Step-by-step explanation:

The decay factor is 1 -25% = 0.75 per hour, so the exponential equation can be written ...

  r(t) = 1450·0.75^t . . . . . milligrams remaining after t hours

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a) After 4 hours, the amount remaining is ...

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About 459 mg will remain after 4 hours.

__

b) To find the time it takes before the amount remaining is less than 5 mg, we need to solve ...

  r(t) < 5

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It will take about 20 hours for the amount of the drug remaining to be less than 5 mg.

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