To round [tex]$154.99 to the nearest ten dollars, follow these steps:
1. Identify the tens and units digits: Look at the number $[/tex]154.99. The tens digit is `5`, and the units digit is `4`.
2. Determine whether to round up or down: If the units digit is `5` or higher, you round up the tens digit by one. If the units digit is `4` or lower, you round down (or keep the tens digit the same).
3. In this case: The units digit for [tex]$154.99 is `4`, which is less than `5`.
4. So, you round down: The tens digit `5` remains `5`.
5. Change the units digit and lower place values to zero: The tens digit remains `5`, and the next lower place values, including the units digit, the tenths place, and beyond, are replaced by zero.
Therefore, $[/tex]154.99 rounded to the nearest ten dollars is [tex]$150.
So, the final result is:
\[ \$[/tex]154.99 \approx \$150. \]
