Answer:
8
----
125
Step-by-step explanation:
(2/5)³
2 2 2 8
--- x --- x --- = ---------
5 5 5 125
I hope this helps!
13. you need a total of 14 a week and you have 1
Step-by-step explanation:
![- |a - 7| - ( - |a - 9| ) = - a + 7 + a - 9 = - 2](https://tex.z-dn.net/?f=%20-%20%20%7Ca%20-%207%7C%20%20-%20%28%20-%20%20%7Ca%20-%209%7C%20%29%20%3D%20%20-%20a%20%20%2B%207%20%2B%20a%20-%209%20%3D%20%20-%202)
<h3>Volume of the rectangular pyramid:</h3>
![v = \frac{lwh}{3}](https://tex.z-dn.net/?f=v%20%3D%20%20%5Cfrac%7Blwh%7D%7B3%7D%20)
![v = \frac{9 \times 8 \times 9}{3}](https://tex.z-dn.net/?f=v%20%3D%20%20%5Cfrac%7B9%20%5Ctimes%208%20%5Ctimes%209%7D%7B3%7D%20)
![v = 216 \: {cm}^{3}](https://tex.z-dn.net/?f=v%20%3D%20216%20%5C%3A%20%20%7Bcm%7D%5E%7B3%7D%20)
<h3>Volume of the rectangular prism:</h3>
![v = lwh](https://tex.z-dn.net/?f=v%20%3D%20lwh)
![v = 8 \times 7 \times 9](https://tex.z-dn.net/?f=v%20%3D%208%20%5Ctimes%207%20%5Ctimes%209)
![v = 504 \: {cm}^{3}](https://tex.z-dn.net/?f=v%20%3D%20504%20%5C%3A%20%20%7Bcm%7D%5E%7B3%7D%20)
<h3>Total volume:</h3>
![v = 216 + 504](https://tex.z-dn.net/?f=v%20%3D%20216%20%2B%20504)
![v = 720 \: {cm}^{3}](https://tex.z-dn.net/?f=v%20%3D%20720%20%5C%3A%20%20%7Bcm%7D%5E%7B3%7D%20)
To solve the value of x we use the sine rule that states.
a/sinA = b/sinB = c/sinC
Where a, b, and c are the opposite sides of angle A, B. and C respectively.
x/sin60 = 7/sin80
x =(7sin60)/sin80
= 6.062/0.9848
=6.155696691
To 3 significant figures the answer is 6.16