Respuesta :

merue

Answer:

B and B

Step-by-step explanation:

I solved in the picture

Hope this helps ^-^

Ver imagen merue

Answer:

a) C. 2.1 × [tex]10^{8}[/tex]

b) B. 5 × 10²

Step-by-step explanation:

a)

(7 × [tex]10^{5}[/tex]) × (3 × 10²) =

C. 2.1 × [tex]10^{8}[/tex]

b)

(2 × [tex]10^{5}[/tex]) ÷ (4 × 10²) =

B. 5 × 10²