Question

O valor de (0,2)3 + (0,16)2 é:
(A) 0,0264
(B) 0,0336
(C) 0,1056
(D) 0,2568
Preciso da conta

Answer 1

Explicação passo-a-passo:

$= (0.2 {)}^{3} + (0.16 {)}^{2}$

$= ( \frac{2}{10} {)}^{3} + ( \frac{16}{100} {)}^{2}$

$= \frac{2 {}^{3} }{ {10}^{3} } + \frac{ {16}^{2} }{ {100}^{2} }$

$= \frac{8}{1000} + \frac{256}{10000}$

$= \frac{8 \times 10}{1000 \times 10} + \frac{256}{10000}$

$= \frac{80}{10000} + \frac{256}{10000}$

$= \frac{80 + 256}{10000}$

$= \frac{336}{10000}$

$= 0.0336$

Letra B

Answer 2

$\sf \left(0,\:2\right)^3+\left(0,\:16\right)^2\\\\\\0.2^3=0.008\\\\\\=0.008+0.16^2\\\\\\0.16^2=0.0256\\\\\\=0.008+0.0256\\\\\\\to \boxed{\sf =0.0336}$