Respuesta :

Answer:

option B

4.5×10^9

Step-by-step explanation:

I HOPE THIS WILL HELP YOU :)

Answer:

B.  4.5 x 10^9.

Step-by-step explanation:

Scientific notation is of the form:

N x 10^n   where  1  ≤ N < 10 and n is an integer ( ≠ 0)

We count the number of digits after the first one ( 4) - this comes to 9.

So the correct  answer is 4.5 * 10^9.

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