Answer:
A. indicate potential danger in environment
Explanation:
Answer:
because students con theories
Breath better because without air u would die and u need that air BC you won't die and it's good for you
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
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confidence coefficient for 90% is 1.64
(1.64*19.4/0.04)^2 = 632661.16
