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Approximately how many times greater is [tex]$5 \times 10^8$[/tex] than [tex]$8 \times 10^5$[/tex]?

A. 62.5
B. 625
C. 6250
D. 625,000

Answer :

To determine how many times greater [tex]\(5 \times 10^8\)[/tex] is than [tex]\(8 \times 10^5\)[/tex], we divide the larger number by the smaller number.

1. Understand the numbers involved:
- [tex]\(5 \times 10^8\)[/tex] means 5 followed by 8 zeros or 500,000,000.
- [tex]\(8 \times 10^5\)[/tex] means 8 followed by 5 zeros or 800,000.

2. Divide the larger number by the smaller number:
[tex]\[
\frac{5 \times 10^8}{8 \times 10^5}
\][/tex]

3. Simplify the expression:
- When dividing numbers in scientific notation, divide their coefficients (the numbers in front) and subtract the exponents of 10.
[tex]\[
\frac{5}{8} \times 10^{8-5} = \frac{5}{8} \times 10^3
\][/tex]

4. Calculate [tex]\(\frac{5}{8}\)[/tex] and [tex]\(10^3\)[/tex]:
- [tex]\(\frac{5}{8} = 0.625\)[/tex]
- [tex]\(10^3 = 1000\)[/tex]

5. Multiply 0.625 by 1000:
[tex]\[
0.625 \times 1000 = 625
\][/tex]

So, [tex]\(5 \times 10^8\)[/tex] is approximately 625 times greater than [tex]\(8 \times 10^5\)[/tex]. Therefore, the answer is 625.

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