Question

Gente
Algm me ajuda pfvvv

Answer 1

$10^{9}$Resposta:

a)8,4862 x $10^{15}$    

b) 2 x $10^{-14}$

c) 0,6 x $10^{-4}$

d) 2,12 x $10^{12}$

Explicação passo-a-passo:

a)    (axb) x (cxd) = (axc) x (bxd)

   (4,21 x $10^{9}$)x (2,2 x $10^{5}$)=   (4,21x 2,2)x  ($10^{9}$x $10^{5}$)= 84,862 x $10^{9+5}$=8,4862 x 10x $10^{14}$=  8,4862x $10^{15}$

b) (6,4x $10^{-3}$)/ (3,2 x $10^{11}$) =  (6,4/ 3,2)x ( $10^{-3}$/ $10^{11}$)= 2x $10^{-3-11}$= 2x$10^{-14}$

c) 5,3x $10^{-4}$- 4,7x  $10^{-4}$= ( $10^{-4}$) (5,3-4,7)= 0,6 x $10^{-4}$

d) Da mesma forma que alternativa anterior:

(9,8x 11,4)($10^{11}$)= 21,2x $10^{11}$= 2,12 x $10^{12}$