

------
13/2170 = 0.006 (to 3 decimal places)
me to so we don’t know how long it is for you
Answer:
π
Step-by-step explanation:
Formula for the circumference of a circle
2r(π)
Area of a circle
πr²
2r(π)=x
x/2(π)=r
π(x/2(π))²=Area
π(x²/4(π)²)=Area
(x²/4(π))=Area
(15π)²÷4π=Area
π
Yes, because the sample is random. If she had chosen the participants in any way other than randomly, it would not be representative of her entire school.