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Gekata [30.6K]
3 years ago
12

A while back, either James borrowed $12 from his friend Rita or she borrowed $12 from him, but he can’t quite remember which. Ei

ther way, he is planning to pay her back or ask that she pay him back this afternoon. If he has $42.80 in his wallet, which equation represents the amounts of money he may have after he sees Rita?
Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
6 0
The answer is x=42.8+- (plus or minus) 12

So he should either have $30.80 or $44.80 left 
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3 years ago
A certain prescription drug diminishes in the system at a rate of 25% per hour. If a person was administered 1450mg of the drug,
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9514 1404 393

Answer:

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Step-by-step explanation:

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

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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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  0.75^t < 5/1450 . . . . divide by 1450

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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
3 years ago
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Answer:

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Step-by-step explanation:

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Question 8=d
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