To determine the amount of money \( m \) that a family must bring to the amusement park so they will have at least $21 to spend after paying a $5 parking fee, we can set up the following inequality:
- After paying the $5 parking fee, the amount of money left is \( m - 5 \).
- We want this to be at least $21:
\[ m - 5 \geq 21 \]
- Now, solve the inequality for \( m \):
\[ m \geq 21 + 5 \]
\[ m \geq 26 \]
Therefore, the correct response is:
m≥26 (m greater-than-or-equal-to 26)