Use scientific notation to determine which of these numbers has the least value: 123,893, 31,892, or 12,786. Write your answer in scientific notation, expressed to the exact decimal place.

To compare the values, we need to write the numbers in scientific notation.

123,893 can be written as 1.23893 × 10^5
31,892 can be written as 3.1892 × 10^4
12,786 can be written as 1.2786 × 10^4

Comparing these numbers, we can see that 3.1892 × 10^4 is the smallest in value.

To compare the values using scientific notation, we need to convert each number into scientific notation.

Let's start with 123,893:
123,893 = 1.23893 x 10^5

Next, we have 31,892:
31,892 = 3.1892 x 10^4

Lastly, we have 12,786:
12,786 = 1.2786 x 10^4

Now we can compare the values.

The number with the least value, expressed in scientific notation, is 1.2786 x 10^4.

To compare the values of these numbers using scientific notation, we need to express each number in scientific notation form.

Let's start by converting 123,893 to scientific notation:

123,893 = 1.23893 x 10^5

Next, let's convert 31,892 to scientific notation:

31,892 = 3.1892 x 10^4

Lastly, let's convert 12,786 to scientific notation:

12,786 = 1.2786 x 10^4

Now that we have all the numbers in scientific notation, we can see that the smallest value is represented by 1.2786 x 10^4.