Question

qual é o número decimal expresso

Answer 1

Resposta:

0.064

Explicação passo-a-passo:

$\frac{[(0.4)^{2} ]^{10} }{[(0.4)^{9} \cdot (0.4)^{7} \cdot (0.4) ]} \\\\\frac{(0.4)^{2 \cdot 10}}{[(0.4)^{9 +7 +1}]} \\\\(0.4)^{(20 -17)}\\\\(\frac{4}{10} )^{3}\\\\\frac{64}{1000} = 0.064$

Answer 2

Resposta:

Explicação passo-a-passo:

9 ) $\frac{(0,4)^{20} }{(0,4)^{9} }.(0,4)^{8} = (0,4)^{20-9} .(0,4)^{8}$

$\frac{2}{5} ^{19}$

10 ) $(a.b)^{5}.c^{5}.(a.b)^{8}.(c)^{7}$  

11 ) $\frac{10^{(50 -31 )} }{10^{16}.2^{11}  }$  

$2^{-8}. 5^{3}$