3 years ago

Which postulate or theorem proves that these two triangles are

1 answer:

4 0

Answer: O AAS Congruence Theorem is your answer

Step-by-step explanation: plz give brainliest

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Alexxandr [17]

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3 years ago

vfiekz [6]

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bonufazy [111]

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Bogdan [553]

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3 years ago

vovangra [49]

Answer:

a) Two half lives, b) $m(276) = 6.526\,g$

Step-by-step explanation:

a) The polonium-210 has a half life of 138.4 days. Therefore, 1.994 half lives have past.

b) Mass decay is described by the following exponential model:

$m(t)=m_{o}\cdot e^{-\frac{t}{\tau} }$

The time constant for the isotope is:

$\tau = \frac{138.4\,days}{\ln 2}$

$\tau = 199.669\,days$

The mass of the isotope after 276 days is:

$m(276) = (26\,g)\cdot e^{-\frac{276\,days}{199.669\,days} }$

$m(276) = 6.526\,g$

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3 years ago