They didn’t use a ruler I think they made their own materials from what they had. Also thank you.
We cannot calculate the confidence interval without the sample size. However, for the second question, the sample size needed would be 49.
The formula we use is

To find the z-score:
Convert 98% to a decimal: 0.98
Subtract from 1: 1-0.98 = 0.02
Divide by 2: 0.02/2 = 0.01
Subtract from 1: 1-0.01 = 0.99
Using a z-table (http://www.z-table.com) we see that this value is closest to a z-score of 2.33.
Using the z-score, our standard deviation (9) and our margin of error (3), we have:
Answer:
total kids in the camp = 300
Step-by-step explanation:
let the number of kids in the camp be x
from the above situation, we get
=》70% of all kids in the camp is 210
=》

=》

=》

=》

If you do 5*the ratio of ur mom then u will get Y which times ur dads ding dong get u f(x)= 758984327934792379427893.
Answer: 
Step-by-step explanation:
The volume
of a rectangular prism is given by:

If the chocolate bar has the following dimensions:



Its volume is:

