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Lady bird [3.3K]
3 years ago
7

If avogadro's number of pennies is divided equally among the 231 million men, women, and children in the united states, how many

dollars would each receive?
Mathematics
1 answer:
Anon25 [30]3 years ago
4 0
<span>2.607 x 10^13 dollars per person. Avogadro's number is approximately 6.0221409x10^23. So divide by the 231 million people. Giving (6.0221409 x 10^23) / (231 x 10^6) = 0.02607 x 10^17 = 2.607 x 10^15 pennies But we want dollars, so divide by 100 2.607 x 10^15 / 100 = 2.607 x 10^13 dollars</span>
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En un curso, el 40 % de los alumnos reprobó un examen. Si el curso tiene 45 alumnos. ¿Cuántos alumnos aprobaron
iVinArrow [24]

Answer:

Cantidad de aprobados= 25

Step-by-step explanation:

Dada la siguiente información:

Reproado= 45%

Aprobado= 55%

Cantidad de alumnos= 45 alumnos

<u>Para calcular la cantidad de aprobados, debemos utiliar la siguiente formula:</u>

<u />

Cantidad de aprobados= cantidad de alumnos*porcentaje aprobados

Cantidad de aprobados= 45*0.55

Cantidad de aprobados= 25

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3 years ago
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telo118 [61]

Given:

The two vectors are:

\overrightarrow{a}=2\hat{i}-\hat{j}+\hat{k}

\overrightarrow{b}=\hat{i}-3\hat{j}+5\hat{k}

To find:

The value of |\overrightarrow{a}\times \overrightarrow{b}|.

Solution:

We have,

\overrightarrow{a}=2\hat{i}-\hat{j}+\hat{k}

\overrightarrow{b}=\hat{i}-3\hat{j}+5\hat{k}

The cross product of these two vectors is:

\overrightarrow{a}\times \overrightarrow{b}=\begin{vmatrix}\hat{i}&\hat{j}&\hat{k}\\2&-1&1\\1&-3&5\end{vmatrix}

\overrightarrow{a}\times \overrightarrow{b}=\hat{i}[(-1)(5)-(1)(-3)]-\hat{j}[(2)(5)-(1)(1)]+\hat{k}[(2)(-3)-(-1)(1)]

\overrightarrow{a}\times \overrightarrow{b}=\hat{i}[-5+3]-\hat{j}[10-1]+\hat{k}[-6+1]

\overrightarrow{a}\times \overrightarrow{b}=-2\hat{i}-9\hat{j}-5\hat{k}

Now the magnitude of the cross product is:

|\overrightarrow{a}\times \overrightarrow{b}|=\sqrt{(-2)^2+(-9)^2+(-5)^2}

|\overrightarrow{a}\times \overrightarrow{b}|=\sqrt{4+81+25}

|\overrightarrow{a}\times \overrightarrow{b}|=\sqrt{110}

Therefore, the value of |\overrightarrow{a}\times \overrightarrow{b}| is \sqrt{110}.

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kipiarov [429]

Answer:

54%

Step-by-step explanation:

162 divide by 300

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3 years ago
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Helen [10]

John made $40 commissions for $500 sales or 40/500. He wants $320 for an unknown amount of sales or 320/x.

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The answer is A
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