To find the amount of money \( m \) that a family must bring to the amusement park so that they will have at least $21 to spend after paying a $5 parking fee, we can set up the inequality as follows:
- The family pays a $5 parking fee, so after paying that, they have \( m - 5 \).
- They want to have at least $21 left, which gives us the inequality:
\[ m - 5 \geq 21 \]
- Now, we add 5 to both sides of the inequality:
\[ m \geq 21 + 5 \]
\[ m \geq 26 \]
Thus, the inequality that shows the amount of money \( m \) that a family must bring to the amusement park is:
m≥26 (m greater-than-or-equal-to 26).