Answer:
Helppppppp Neeeeeeeeded asapppppp
Step-by-step explanation:
It is impossible to list the set of rational numbers using the roster method because the set of rational numbers is uncountable/inumerable.
There is no way to list all the members of the set of rational numbers.
Answer:
<h2>only x = 39</h2>
Step-by-step explanation:
x + 6 = 45 <em>subtract 6 from both sides</em>
x + 6 - 6 = 45 - 6
x = 39
There were 42 people at the conference
Answer:
P(x=25)=P(z=2)=0.9972 or 99.72%
Step-by-step explanation:
Mean = 18 pounds
Standard Deviation = 3.5 pounds
x= 25
We need to find P(x=25)
First, we need to find z-score using formula: ![z-score=\frac{x-\mu}{\sigma}](https://tex.z-dn.net/?f=z-score%3D%5Cfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D)
Finding z-score when x=25
![z-score=\frac{x-\mu}{\sigma}\\z-score=\frac{25-18}{3.5}\\z-score=2](https://tex.z-dn.net/?f=z-score%3D%5Cfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D%5C%5Cz-score%3D%5Cfrac%7B25-18%7D%7B3.5%7D%5C%5Cz-score%3D2)
So, we need to find P(z=2)=P(x=25)
Looking at z-score table we can find P(z=2)
P(z=2)=0.9972 or 99.72%
So, P(z=2)=0.9972 or 99.72%