Question

Determine o valor de x na equação abaixo:

x=8,1.10^20/9,0.10^21

a) 9,0x10^40
b)9,0
c)9,0x10^1
d)9,0x10^-1
e)9,0x10^-19

Answer 1

¡Hey!!

Resposta:

X = 9×10^-2

Explicação:

$x = \frac{ {8.1 \times10 }^{20} }{ {9.0 \times 10}^{21} } \\ x = \frac{8.1}{9} \times {10}^{20 - 21} \\ x = 0.9 \times {10}^{ - 1} \\ x = 9 \times {10}^{ - 2}$

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