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guajiro [1.7K]
3 years ago
8

Help please I just need a couple so I can remember how to do this with explanation please I'll give brainliest :)

Mathematics
1 answer:
nekit [7.7K]3 years ago
7 0
1. 18,000 x 1.03 (3% increase) either type 1.03 into your calculator 25 times or use an exponent ↓↓↓↓↓↓↓
18000 x 1.03^25 (25 years past)  =37,688.00 
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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:

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  • 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

__

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

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About 459 mg will remain after 4 hours.

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

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  t > log(1/290)/log(0.75) . . . . . divide by the (negative) coefficient of t

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

7 0
2 years ago
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If the problem was written x + 4x.  We would know to add like the coefficients together and get 5x  same thing with the radicals.

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