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iris [78.8K]
3 years ago
11

La contaminación atmosférica es uno de los problemas ambientales que ocasiona el ser humano. La atmósfera en su estado puro está

constituida por un 20,946 % de oxígeno, 0,934 % de argón, un 0,036 % de trazas y el resto de nitrógeno. a) ¿Qué porcentaje (¿%) del componente atmosférico representa el nitrógeno?
Mathematics
1 answer:
grandymaker [24]3 years ago
3 0

Answer:

78.084%

Step-by-step explanation:

a) ¿Qué porcentaje (%) del componente atmosférico representa el nitrógeno?

Se nos dice que:

La atmósfera en estado puro está compuesta por 20.946% de oxígeno, 0.934% de argón, 0.036% de trazas y el resto de nitrógeno.

Deje que el contenido total de la atmósfera se represente como: 100%

Por lo tanto:

100% = 20.946% + 0.934% + 0.036% + nitrógeno

1 = 0.20946 + 0.00934 + 0.00036 + nitrógeno

1 = 0.21916 + nitrógeno

Nitrógeno = 1 - 0.21916

Nitrógeno = 0.78084

Convertir a porcentaje = 0.78084 × 100

= 78.084%

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3 years ago
The sum of the digits of a two-digit number is 12. The number formed by reversing the digits is 54 more than the original number
andreyandreev [35.5K]

Answer:

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Step-by-step explanation:

let the 2 digit number be ab = 10a + b ( considering place value )

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The sum of the 2 digit number is

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a = 12 - b → (1)

Expressing as an equation

ba = ab + 54 , that is

10b + a = 10a + b + 54

Substitute a = 12 - b into the equation

10b + 12 - b = 10(12 - b) + b + 54 , simplify both sides

9b + 12 = 120 - 10b + b + 54

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18b + 12 = 174 ( subtract 12 from both sides )

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a = 12 - 9 = 3

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3 years ago
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Answer:

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Step-by-step explanation:

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x = sin 53.13 x 18 = 14.4

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<h2>Greetings!</h2><h3>When expanding brackets, you simply multiply whatever is inside the brackets by what is outside:</h3>

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3 years ago
Read 2 more answers
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