Write a real-world problem that can be represented by the inequality \( s<20 \). Represent the solution on a number line.

Real-World Problem: A school is planning a field trip using a small bus that can safely transport fewer than 20 students at a time. Let s represent the number of students that can ride the bus safely. Since the bus must carry fewer than 20 students, the situation can be modeled by the inequality   s < 20. Solution on a Number Line: 1. Draw a horizontal line. 2. Mark a point at 20 with an open circle (indicating that 20 is not included in the solution). 3. Shade or draw an arrow extending to the left from 20 to indicate all numbers less than 20 satisfy the inequality. Illustration:   <-----•======== (with the open circle at 20, and the shading/arrow to the left) This number line shows that any number less than 20 is a valid number for s in our problem.