10!!! POINTS AND BRAINLIEST!!!

Answer:
[tex]\boxed {\boxed {\sf 53}}[/tex]
Step-by-step explanation:
This is a stem and leaf plot, so the stem represents the first digit, while the leaf is the last digit.
The first stem is 0, with a leaf of 4. Therefore,
The last stem is 5, with 2 leaves: 6 and 7. We want to find the largest number, so we will use 7.
The range is the difference between the largest and smallest number. The largest number is 57 and the smallest is 4.
The range is 53.