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riadik2000 [5.3K]
3 years ago
7

The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half of its initial m

ass. Starting with 195 g of radioactive isotope how much will be left after five lives? round to the nearest gram
Mathematics
1 answer:
Dovator [93]3 years ago
4 0
1st half life: 195/2 = 97.5 g
2nd half life: 97.5/2 = 48.75 g
3rd half life: 48.7/2 = 24.375 g
4th half life: 24.375/2 = 12.1875 g
5th half life: 12.1875/2 = 6.09375 g

or you can do
195(2)^(-5) = 6.09375
** rounded to nearest gram = 6 g

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I WILL GIVE BRAINLIEST TO WHOEVER IS CORRECT
Ulleksa [173]

A triangle is rotated around N to give the primed version.


A. Same shape and size -- TRUE.  Rotation doesn't change shape or size.

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7 0
3 years ago
I really need help with this one
Novay_Z [31]

Answer:

28

Step-by-step explanation:

Since B is the midpoint of AC, that means AB = BC. That means 3x+4 = 5x-6. We can now set up an equation to solve for x:

3x+4 = 5x-6

3x+10 = 5x

10 = 2x

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Now that we know what x is, we can just plug x into the expression of AB and multiply it by 2:

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(side note: we could have plugged x into the expression of BC as well, but in this case plugging it into AB tends to be easier to solve)

Therefore, the length of AC is 28.

3 0
3 years ago
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