Given
The statements,
1. How much the car weighs
2. The highest temperature over three days.
3. The length of the track.
4. Five feet tall.
To find: Which of the above statements contain a variable?
Step-by-step explanation:
It is given that,
The statements,
1. How much the car weighs
2. The highest temperature over three days.
3. The length of the track.
4. Five feet tall.
That implies,
The statement with a variable is
3. The length of the track.
Because, the length of the track is unknown.
Hence, the answer is option 3. The length of the track.