SOLUTION
Concept: Rounding-off of Numbers
To round off numbers, you follow the rule below
![\begin{gathered} 0-4=\text{round off to 0 and add to the previous digit} \\ 5-9=\text{round off to 1 and add to the previous digit} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/a4ptv3ugm52n77436aq2vcut4qmcn8vb6j.png)
To round off the number to the nearest tens
![73,486](https://img.qammunity.org/2023/formulas/mathematics/college/6zbaxar8r4zkwd2z6w5x325v11ugf88oge.png)
Identify the tens digit, which is
![8](https://img.qammunity.org/2023/formulas/mathematics/high-school/yhwsr0hj9zc72y2rvqxvnjk2buonrgs3z6.png)
The number before it is
![\begin{gathered} 6\text{ } \\ \text{which is rounded off to 1 and added to the tens digit } \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/w152lyhlsncjuiq0dieu1yhih1mvgwigsj.png)
Then the value becomes
![73,490](https://img.qammunity.org/2023/formulas/mathematics/college/g2tipqyz808huggi7vg9mgmu00jhmysmgb.png)
Therefore 73,486 becomes 73,490 to the nearest ten