11. The average distance in kilometers between the Sun and Earth is [tex]$150,000,000$[/tex]. How is this number expressed in scientific notation?

A. [tex]$1.5 \times 10^8$[/tex]

B. [tex]$15 \times 10^8$[/tex]

C. [tex]$15 \times 10^7$[/tex]

D. [tex]$1.5 \times 10^7$[/tex]



Answer :

To express [tex]\(150,000,000\)[/tex] in scientific notation, we need to follow these steps:

1. Identify the Significant Figures:
- First, identify the significant figures in the number [tex]\(150,000,000\)[/tex]. This number can be written as [tex]\(1.5 \cdot 100,000,000\)[/tex].

2. Determine the Power of 10:
- Next, we need to identify how many places we need to move the decimal point to the right in the number [tex]\(1.5\)[/tex] to get [tex]\(150,000,000\)[/tex].
- The number [tex]\(100,000,000\)[/tex] can be expressed as [tex]\(10^8\)[/tex], since it has eight zeros.

3. Combine Significant Figures and the Power of 10:
- Putting it all together, [tex]\(150,000,000\)[/tex] can be rewritten as [tex]\(1.5 \times 10^8\)[/tex].

Therefore, the number [tex]\(150,000,000\)[/tex] expressed in scientific notation is [tex]\(1.5 \times 10^8\)[/tex].

Thus, the correct choice is:
[tex]\[ 1.5 \times 10^8 \][/tex]

In conclusion, the correct answer is [tex]\( \boxed{1.5 \times 10^8} \)[/tex].