2 years ago

Which situation can be represented by y = 20x?

Mathematics

1 answer:

NeX [460]2 years ago

4 0

The correct answer is the last one

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What is the best order-of-magnitude for 0.000006?

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So,

Optimally, we want a number between 1 and 10 multiplied by a power of ten.

If we move the decimal place 6 places to the right, we get 6.

So we want $10^{-6}$ .

The correct option is C.

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3 years ago

X/3 = 5/x-1 cross multiply

defon

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2 years ago

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

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

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

$\frac{1}{2}=e^{-0.1374t}$

Taking log on both sides, we get

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

$t=\frac{ln\frac{1}{2}}{-0.1}$

$t=\frac{-0.6931}{-0.1374}$

$t=5.0days$

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2 years ago

A runner completed a 26.2 mile marathon in 210 minutes.

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26.2/210= .125 miles per minute
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