Question

qual desses numeros e igual a √ 0.0064
a)^1 8
b)^8 10
c) ^2 25
d) ^1 80

Answer 1

√0,0064

√(10^(-4) . 8²)

10^(-2) .  8

8/100

2/25

Resposta: c) 2/25

Answer 2

Explicação passo-a-passo:

$\sf E=\sqrt{0,0064}$

$\sf E=\sqrt{\dfrac{64}{10000}}$

$\sf E=\dfrac{\sqrt{64}}{\sqrt{10000}}$

$\sf E=\dfrac{\sqrt{8^2}}{\sqrt{100^2}}$

$\sf E=\dfrac{8}{100}$

$\sf E=\dfrac{8\div4}{100\div4}$

$\sf \red{E=\dfrac{2}{25}}$

Letra C