Please help me, I don’t understand Pi.

Answer:
1. C
2. G
3. E
4. B
Step-by-step explanation:
1. The formula for the circumference is 2[tex]\pi[/tex]r. 2[tex]\pi[/tex]1.4 ≈ 8.8
2. The diameter is two times the radius. 2[tex]\pi[/tex]r. 2[tex]\pi[/tex]2.6 ≈ 8.2
3. The diameter is two times the radius. 2[tex]\pi[/tex]4.75 ≈ 29.7
4. The diameter is two times the radius. 2[tex]\pi[/tex]4.2 ≈ 26.4