Answer:
[tex]\mathrm {7.1 \: inches}[/tex]
Step-by-step explanation:
Circumference of a circle is [tex]\pi d[/tex]
The diameter is [tex]2.25[/tex] inches as shown in the readings of the scale.
[tex]2.25\pi[/tex]
[tex]\approx 7.06858347058[/tex]
