Answer:
This was an observational study.
Step-by-step explanation:
Given is that parents of children completed a questionnaire on the child’s light exposure both at present and before the age of 2 years.
This was an observational study since there is no treatment or control group.
We know that treatment, control groups or treatment groups are not specific to randomized control experiments.
Answer:
Step-by-step explanation:
see the attached figure with letters to better understand the problem
step 1
Find the measure of arc BC
we know that
----> by complete circle
substitute the given values
step 2
Find the measure of angle 2
we know that
The inscribed angle is half that of the arc it comprises.
so
![m\angle 2=\frac{1}{2}[arc\ BC]](https://tex.z-dn.net/?f=m%5Cangle%202%3D%5Cfrac%7B1%7D%7B2%7D%5Barc%5C%20BC%5D)
substitute
![m\angle 2=\frac{1}{2}[116^o]=58^o](https://tex.z-dn.net/?f=m%5Cangle%202%3D%5Cfrac%7B1%7D%7B2%7D%5B116%5Eo%5D%3D58%5Eo)
Answer:
18
Step-by-step explanation:
It is important to recognize that there are different terms here. Terms are separated by operation. The 6 is separate from the 4(1+2)
