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lianna [129]
3 years ago
12

2 sobre 5 por 7 sobre 8 por 10 sobre 21 PARA MAÑANA PLISS​

Mathematics
1 answer:
expeople1 [14]3 years ago
3 0

Answer:I don’t speak Spanish .

Step-by-step explanation:

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Situation:
omeli [17]

The half life of the substance is 6.92 days.

<h3>What is the Half life  ?</h3>

Half life can be defined as the time required to reduce the concentration to half of its initial value.

Here the equation given is

\rm N = N_o e^{-kt}

The concentration will reduce to half therefore

\rm   N= \dfrac{N_o}{2}

so,

\rm 39/2 = 39  e^{- 0.1001 * t_{1/2}}

ln 0.5 = - 0.1001 * t(1/2)

-0.693 = -.1001 * t(1/2)

t(1/2) = 6.92 days.

Therefore the half life of the substance is 6.92 days.

To know more about Half Life

brainly.com/question/24710827

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4 0
1 year ago
What is the multiplicative inverse of 8? <br> -1/8 <br> 1/8 <br> -8 <br> 0.08
Lemur [1.5K]

Answer: it's 1/8

Step-by-step explanation:

4 0
3 years ago
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miss Akunina [59]

Answer:

top left perimeter is 36 top left is 28 bottom right is 72 i cant see the bottom left

Step-by-step explanation:

but yeah just take each number multiply by 2 then add both of them up

7 0
2 years ago
30% of what number is 10.2
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30.6 because 10.2 times 30 is 30.6
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3 years ago
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I sent pic for help. Question has 3 parts
anastassius [24]
P(head)=178/200
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