Question

(4,3 x 10^2) x (4,0 x 10^-3)

Answer 1

$(4.3 \times 10 {}^{2} ) \times (4.0 \times 10 {}^{ - 3} )$

$(4.3 \times 4) \times (10 {}^{2} \times 10 {}^{ - 3} )$

$17.2 \times 10 {}^{2 + ( - 3)}$

$17.2 \times 10 {}^{2 - 3}$

$17.2 \times 10 {}^{ - 1}$

Answer 2

Oie, tudo bom?

$= (4,3 \: . \: 10 {}^{2} ) \: . \: (4\: . \: 10 {}^{ - 3} ) \\ = (4,3 \: . \: 4) \: . \: (10 {}^{2} \: . \: 10 {}^{ - 3} ) \\ = 17,2 \: . \: 10 {}^{2 + ( - 3)} \\ = 17,2 \: . \: 10 {}^{2 - 3} \\ \boxed{ = 17,2 \: . \: 10 {}^{ - 1} }$

Att. NLE Top Shotta