Question

2.0,0000001+3.0,0000002sobre
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0,0000001+0,0000002

Answer 1

Aplicando propriedades operatórias de potencias

           $\frac{2x 10^{-7}+ 3x2x10^{-7} }{10 ^{-7} +2x 10^{-7} } \\ \\= \frac{ 10^{-7} (2+6)}{ 10^{-7}(1+2) } \\ \\= 10^{-7+7}( \frac{8}{3}) \\ \\ = \frac{8}{3} \\ \\ c$

Answer 2

Ola Jota 

E = (2*0.0000001 + 3*0.000002)/(0.0000001 + 0.0000002) 

E = 0.0000001*(2 + 3*2)/(0.0000001*(1 + 2))

E = 8/3