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3 years ago

9

a radioactive substance has a half-life of 2 seconds. A scientist begins with a sample of 20 grams. How much of the substance re

mains after 8 seconds?

1 answer:

s344n2d4d5 [400]3 years ago

5 0

Answer:

1.25 g

Step-by-step explanation:

you start with 20g at 0 seconds.

divide by half after 2 seconds and you have 10g.

at 4 seconds you have 5g.

at 6 seconds you have 2.5g.

at 8 seconds you have 1.25g.

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Answer:

Step-by-step explanation:

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Equation:

$y -y_{1}=m(x -x{1})\\\\y - 9 = \dfrac{15}{2}(x-4)\\Multiply \ the \ entire \ equation \ by 2\\\\2*(y -9)=2*\dfrac{15}{2}(x-4)$

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3 years ago

Which of the following is NOT a description for Normal Distribution of data.

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B. The Mean = The Median = The Mode

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Step-by-step explanation:

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3 years ago

A cone and cylinder have the same radius and the same volume. The cylinder has a height of 10m and a radius of 12m. Find the vol

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4523.89m

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3 years ago

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0.01 0.03 0.09 0.35 0.41 0.41 0.41 0.42 0.54 0.57 0.71 0.77 0.83 0.87 0.93 0.95 0.99 1.01 1.01 1.09 1.12 1.33 1.34 1.45 1.48 1.4

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Step-by-step explanation:

$median = \frac{1.48 + 1.49}{2}$

$= \frac{2.97}{2}$

$= 1.485$

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3 years ago