Melody

$$\\\sqrt{75}+\sqrt{12}\\\\
=\sqrt{25*3}+\sqrt{4*3}\\\\
=5\sqrt3+2\sqrt3\\\\
=7\sqrt3$$

A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 6.0cm . Its mass is 1.1kg . Calculate the density of the metal.

0.032*171*0.06m^3

$${\mathtt{0.032}}{\mathtt{\,\times\,}}{\mathtt{171}}{\mathtt{\,\times\,}}{\mathtt{0.06}} = {\frac{{\mathtt{1\,026}}}{{\mathtt{3\,125}}}} = {\mathtt{0.328\: \!32}}$$     m^3

density =  $${\frac{{\mathtt{1.1}}}{{\mathtt{0.328\: \!32}}}} = {\frac{{\mathtt{6\,875}}}{{\mathtt{2\,052}}}} = {\mathtt{3.350\: \!389\: \!863\: \!547\: \!758\: \!3}}$$     kg/m^3

There is no question here!

inverse sin is the same as arc sine

So use asin on the forum calc.  :)

Anyway, you can not find asin(1.29) it does not exist!

sine rations must be between -1 and 1 inclusive. 

What are you talking about?

I think it is an old fashioned window.  Squash up  1+1 so it is all touching then finish the square around the outside.   That makes a little 'french window'. 

the may not be a negative dragon.

6--8=6+8=14

-2--5=-2+5=3

-8--1=-8+1=-7

There is not a balanced number of brackets so I do not know what the question is.  

$$\\5000=5\times7^{0.5}x\\\\
5000=5\times \sqrt7\;x\\\\
1000= \sqrt7\;x\\\\
x= \frac{1000}{\sqrt7}\\\\
or\\\\
x=\frac{1000\sqrt7}{7}$$