4 years ago

Please explain question nine, I’m struggling with math and I wanna dieeee

Mathematics

1 answer:

-BARSIC- [3]4 years ago

7 0

It’s 17 because the ranking of the two teams add up to 17

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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:

$M_{R} = \frac{M_{O} }{2^{n} }$

$n=\frac{t}{t\frac{1}{2} }$

Where $M_{R}$ = mass remaining

$M_{O}$ =original mass.

t= time

$t\frac{1}{2}$ =half life

$t\frac{1}{2}$ =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%

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3 years ago

-. Find the common difference for the arithmetic sequence: 36, 30, 24, 18.

nirvana33 [79]

6 because 18+6=24+6=30+6=36

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3 years ago

A student writes the equation for a line that has a slope of -6 and passes through the point (2, –8).

Tcecarenko [31]

Answer:

y = -6x + 20

Step-by-step explanation:

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4 years ago

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m_a_m_a [10]

Isn't it 1 ?

-15 + x = -14

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3 years ago

HELP please... me please

andriy [413]

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3 years ago