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Scrat [10]
3 years ago
6

JNCHH$JCERLKERIUVHCEKCORCURNJ

Mathematics
1 answer:
DIA [1.3K]3 years ago
7 0

Answer:

YAs

Step-by-step explanation:

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What percent of a present amount of radioactive radium (226Ra) will remain after 1200 years? The half life of 226Ra is 1599 year
sp2606 [1]

Answer:

59.44%

Step-by-step explanation:

<em>M_{R} = \frac{M_{O} }{2^{n} }</em>

<em>n=\frac{t}{t\frac{1}{2} }</em>

<em>Where M_{R} = mass remaining</em>

<em>M_{O} =original mass.</em>

<em>t= time </em>

<em>t\frac{1}{2} =half life</em>

t\frac{1}{2} =1599,  t= 1200, M_{O} =226,  M_{R} =?

n=\frac{1200}{1599}

n= 0.750469

M_{R} = \frac{226}{2^{ 0.750469} }

M_{R} =134.3367amu

percentage of mass remaining = \frac{134.3367amu}{226amu} *100%

                                                   = 59.44%

8 0
3 years ago
Write an equation that described how many cups of milk, m, would be needed for b cups of blueberries. 6 cups of milk for 2 cups
WITCHER [35]

Answer:

6 x 2 = ?

6 x 2 = 1 2

Step-by-step explanation:

6 cups of milk and 2 cups of blueberries multiply them from each other and you get your answer .

6 0
3 years ago
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There were 78 girls trying out for dance.
Rainbow [258]

\frac{78}{d} .........where 78 is the total girls and d is the number of girls in a group.

5 0
2 years ago
Pleease helpthis is my final exam<br> I want the answer of second question
SVETLANKA909090 [29]

Answer:

7

Step-by-step explanation:

as it does that F thing where its equal to it....

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Which number logically follows this series? 2. 4 6 9 6 14 6 ..?
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I say the 6 and the 9 because you see it through out a lot and u add and subtract 3 you get the same answer.
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