A perfect cube is a natural number in the form

therefore

and also you can define it as any natural number who's third root is also a natural number for examble
![\sqrt[3]{1000} = 10](https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B1000%7D%20%20%3D%2010)
so you can say that the tenth perfect cube is 1000
5.66 (3 significant figures)
Answer:
Lin's mother is the type that finds information about the area
In this question we can see
that there is one unknown variable named “y” and one equation. So it is
absolutely possible to find the correct value of the unknown variable “y”. Now
let us check the equation that is given and solve it correctly.
y - 18 = 10
y = 10 + 18
= 28
So the value of the unknown variable “y” is 28. I hope this
is the answer you were looking for and the procedure is clear to you.
Irrational because square root of 27= 5.19615242271