Given:
Total income = $135 per day
Time = 9 hours
To find:
The amount Sid earns in an hour.
Solution:
According to the question,
The amount Sid earns in 9 hour = $135
The amount Sid earns in one hour =
![(\$135)/(9)](https://img.qammunity.org/2021/formulas/mathematics/high-school/knd4s0vrt1ze3kfl6x8hqladwpnno8wwf4.png)
=
![\$15](https://img.qammunity.org/2021/formulas/mathematics/high-school/dgozwxlr4dm3pzhuyzo2qilkewdpqt1thy.png)
Sid earns $15 in an hour as a babysitter.
Therefore, the correct option is B.