Answer:
D. Comets spend most of their time far from the Sun.
I believe the answer is B, I hope that helps!
Answer:
confidence coefficient for 99% is 2.58
2.58 * 19.4/sqrt(n) = 0.04
2.598*19.4/0.04 = sqrt(n)
( 2.598*19.4/0.04)^2 = n
1587676
---------------------------------------------------------------------------
confidence coefficient for 90% is 1.64
(1.64*19.4/0.04)^2 = 632661.16
Answer:
true since it is whose variation that does not depend on that of another.