Question

Se x = $2^{5}$ · $4^{2}$ · $5^{4}$ e y = $2^{8}$ · $5^{3}$ então x : y é igual a:

A) $\frac{1}{10}$
B) - 10
C) 10
D) 2
E) 5

Answer 1

$\dfrac{x}{y}=\dfrac{\cancel{{2}^{5}}.{4}^{2}.\cancel{{5}^{4}}}{\cancel{{2}^{8}}.\cancel{{5}^{3}}}$

$\dfrac{x}{y}=\dfrac{16.5}{{2}^{3}}=\dfrac{80}{8}=10$