(x^2y^4/x^-3y^7)^-2 simplifies to 1/(x^(5)y^(11))^2
Undefined terms are formed using known words or terms to describe a new word. The three undefined terms are point, line and plane. These 3 terms are the building blocks of geometry. They are explained but not defined unlike other terms. Hope this helps.
9,000 that will be you answer or if is double will be 18,000
The magnitude of the vector is

the component form is
<2,5>
The ratio is 1:5 tbh or that’s what I think ahahahah