Question

What is 4,500,000,000 in scientific notation?

A. 45 x 10^-7
B. 4.5 x 10^9
C. 4.5 x 10^-9
D. 4.5 x 10^8

Answer 1

B. 4.5 x 10^9.

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.

Answer 2

option B

4.5×10^9

Explanation:

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