use scientific notation to find out which of these is greater 123,893 31,829 or 12,786 write u answer in scientific notation expressed to the exact decimal place

To compare these numbers in scientific notation, we need to convert each number into scientific notation first:

123,893 = 1.23893 x 10^5
31,829 = 3.1829 x 10^4
12,786 = 1.2786 x 10^4

Comparing the numbers, we see that 1.23893 x 10^5 is greater than both 3.1829 x 10^4 and 1.2786 x 10^4.

Therefore, 123,893 is the greatest number among 123,893, 31,829, and 12,786 when expressed in scientific notation.