kitty<3

Ok, so the first one states that x > 3. The second one with the arrow pointing right also shows x > 3. The last one would translate to x > 3 as well.

The third choice, however, shows 3 > x. This is the same as x <3, so the third inequality is different.

Con un flujo constante de un fluido no viscoso, la presión / densidad + energía total por unidad de masa es constante.

$${\mathtt{2\,000\,000}}{\mathtt{\,\times\,}}{\mathtt{0.16}} = {\mathtt{320\,000}}$$

8 dividido por 3:

$${\frac{{\mathtt{8}}}{{\mathtt{3}}}} = {\mathtt{2.666\: \!666\: \!666\: \!666\: \!666\: \!7}}$$

Sí, lo es:)

First, check that you wrote the expression correctly. 1.4.2 should not have two decimal points (with standard numbers).

Then, you are free to post again or use the site's calculator:)  http://web2.0calc.com/

The mixed number would be 226 and 5607/10000. Since 5607 and 10000 have no common factors (other than 1), 5607/10000 is the simplest form.

Esta calculadora no tiene botón de %.

Se puede escribir percentaje como un número decimal. Por ejemplo, escribe 27.5% como 0.275

It's fine, Ninja:) You saved me the work there