2 years ago

Which statement compares the two numbers correctly?

Mathematics

1 answer:

Mariulka [41]2 years ago

6 0

Answer:

Step-by-step explanation:

Six hundred seventy-two thousandths < 0.8

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A 46 gram sample of a substance that is used to sterilize surgical instruments has a k-value of 0.1374. Find the substance's hal

mars1129 [50]

Answer:

$t=5.0days$

Step-by-step explanation:

Using the formula for the exponential decay that is $N=N_{0}e^{-kt}$ , we have N= $\frac{1}{2}{\times}46=23$ , $N_{0}=46$ and k=0.1374.

Thus, $N=N_{0}e^{-kt}$ becomes

$23=46{\times}e^{-0.1374t}$

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Taking log on both sides, we get

$ln(\frac{1}{2})={-0.1374t}$

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