The answer is 4. I hope this helped.
Answer:

Step-by-step explanation:
Square root of 9 is 3
20 is 4.472135955
27 is 5.19615242271
4.5 is intantly wrong because it is rational.
Answer:
10
Step-by-step explanation:
diameter is half of radius
9514 1404 393
Answer:
√629 ≈ 25.08
Step-by-step explanation:
The distance formula is useful for this.
d = √((x2 -x1)² +(y2 -y1)²)
d = √((-12 -13)² +(6 -8)²) = √(625 +4) = √629 ≈ 25.08
The distance between the points is about 25.08 units.