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A hole?

Yes man up just send someone else a message then

$\text{density}=\frac{\text{mass}}{\text{volume}} \\~\\ 0.71 \frac{\text{g}}{\text{cm}^3}=\frac{\text{mass}}{1728\text{ cm}^3} \\~\\ 0.71 \frac{\text{g}}{\text{cm}^3} * 1728\text{ cm}^3=\text{mass} \\~\\ 1226.88 \,\text{g} = \text{mass}$

A crane is a pulley because Cranes are large construction machines that are used to lift heavy objects. They have a pulley at the top of the pole that pulls up the load. Theaxle of a Ferris wheel is the part that the wheel spins around. It is in the center of the whole construction.

D = {6​, 9​, 11​}

E =​ {6​, 8​, 9​, 10​}

D $\cup$ E = {6, 9, 11, 8, 10}

I could just tell you....but I want to explain it, so that you don't have to just memorize it! 

Say we want to know the distance between these two points: (1, 2) and (4, 6)

The length of the purple line is the distance between them.

Hey! We can make a right triangle out of this, with the purple line as the hypotenuse. Now we can use the Pythagorean theorem to find the length of the purple line, which I called c.

3² + 4² = c²

25 = c²

5 = c

And the distance formula comes from the Pythagorean theorem.

(difference in x's)² + (difference in y's)² = (distance between the two points)²

$\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}=\text{distance between the two points}$

And that is the distance formula! 

Distance formula: 

https://www.screencast.com/t/2b4GDp2N

Hope this helps! : )

maybe some times but still math is cool

9^3 = 729

9*9*9 = 729

for me that is true

remain the some sign of the larger number.

the only thing better than math is....................umm nothing

A negative number plus a positve number will always....

result in a negative number.

result in a positive number.

remain the same sign of the larger number.

remain the same sign of the smaller number.