The diameter is 18 so in exact terms the circumference would be 18 pi but if you were to get an estimate of the circumference you would multiply the diameter, 18, by 3.14 and get an answer of 56.52. So the circumference in exact terms is 18 pi or estimated to be 56.52 in.
-10(1/4b^2+4)
= -5/2b^2-40
To find sales tax you need to multiply the sales tax by the item. Also, you need to slide the decimal over two places to the left before doing this. So, .12*105=12.6 is the total sales tax on the second item!
Hope this helps! Would love brainliest!
You can simplify it further to: 2n-1 over 3n-5
Answer:
This study is good because we have minimized sampling error.
Step-by-step explanation:
We are given that . The researcher has two groups.
The researcher classifies the students based on when they volunteer for the study.
The first 50 students who volunteer receive online instruction. The next 50 receive instruction by attending a class with a teacher.
A. This study is poor because the researcher did not use random sampling.
B. This study is poor because the researcher did used random sampling.
C. This study is good because we have minimized sampling error.
D. This study is good due to the equal sample size in each group.
Option C is true : This study is good because we have minimized sampling error.