Answer:
3/400
Step-by-step explanation:
Let w represent earth's water
let f represent fresh water and let g represent ground water
![f = \frac{1}{40}w](https://tex.z-dn.net/?f=f%20%3D%20%5Cfrac%7B1%7D%7B40%7Dw)
![g =\frac{3}{10}f = \frac{3}{10}(\frac{1}{40}w)\\ \\g = \frac{3}{400}w](https://tex.z-dn.net/?f=g%20%3D%5Cfrac%7B3%7D%7B10%7Df%20%3D%20%5Cfrac%7B3%7D%7B10%7D%28%5Cfrac%7B1%7D%7B40%7Dw%29%5C%5C%20%5C%5Cg%20%3D%20%5Cfrac%7B3%7D%7B400%7Dw)
Therefore, fraction of earth's water,w, that is ground water = 3/400
Step-by-step explanation:
a is the interior angle of the 2 opposing arc angles. the interior angle is the mean value between the 2 arc angles.
a = (145 + 45)/2 = 190/2 = 95°
b is the simply the supplementary angle to a (meaning together they are 180°, because the sum of all angles around a single point on one side of a line is 180°).
b = 180 - 95 = 85°
Answer:
(0,0) (-1,-1)
Step-by-step explanation:
Answer:
![j=4\\k=10](https://tex.z-dn.net/?f=j%3D4%5C%5Ck%3D10)
Step-by-step explanation:
![8x^3 - 125](https://tex.z-dn.net/?f=8x%5E3%20-%20125)
![\left(2x\right)^3-5^3](https://tex.z-dn.net/?f=%5Cleft%282x%5Cright%29%5E3-5%5E3)
Use this formula:
![x^3-y^3=\left(x-y\right)\left(x^2+xy+y^2\right)](https://tex.z-dn.net/?f=x%5E3-y%5E3%3D%5Cleft%28x-y%5Cright%29%5Cleft%28x%5E2%2Bxy%2By%5E2%5Cright%29)
Where,
![x=2x\\y=5](https://tex.z-dn.net/?f=x%3D2x%5C%5Cy%3D5)
Substitute in the values.
![\left(2x\right)^3-5^3=\left(2x-5\right)\left(2^2x^2+5\cdot \:2x+5^2\right)](https://tex.z-dn.net/?f=%5Cleft%282x%5Cright%29%5E3-5%5E3%3D%5Cleft%282x-5%5Cright%29%5Cleft%282%5E2x%5E2%2B5%5Ccdot%20%5C%3A2x%2B5%5E2%5Cright%29)
![\left(2x-5\right)\left(4x^2+10x+25\right)](https://tex.z-dn.net/?f=%5Cleft%282x-5%5Cright%29%5Cleft%284x%5E2%2B10x%2B25%5Cright%29)