Question

Which of these numbers is the greatest?A.2.3 x 10*4B.8.6 x 10*3C.1.2 x 10*4D.3,600

Answer 1

Given:

To get the number that is the greatest, we convert the numbers in scientific notation to ordinary numbers and then compare.

`\begin{gathered} 2.3*10^4=2.3*10000=23,000 \\ 8.6*10^3=8.6*1000=8,600 \\ 1.2*10^4=1.2*10000=12,000 \\ 3,600=3,600 \\ \\ \text{Arranging in descending order (highest to the lowest),} \\ 23,000>12,000>8,600>3,600 \\ \\ \text{Hence, 23,000 is the greatest.} \\ 23,000=2.3*10^4 \end{gathered}`

Therefore, the greatest among the numbers is;

`2.3*10^4`

Hence, OPTION A is the correct answer.