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:
50 inches Approx
Step-by-step explanation:
GIven data
Width= 44in
Length= 24in
Diagonal=???
We know that the expression for the diagonal is given as
D^2= W^2+L^2
substitute
D^2= 44^2+24^2
D^2= 1936+576
D^2= 2512
D=√2512
D= 50.11
Hence the size of the TV is 50 inches Approx
Answer:
A. 25 girls
Step-by-step explanation:
Suppose the number of boys is b and the number of girls is g.
We know that the ratio of boys to girls is 6 to 5, so we can write this as:
b:g = 6:5 or b/g = 6/5
We also know that there are 30 boys, so b = 30. We plug this value of 30 in for b in our ratio. Now, we just have a proportion with one variable g:
⇒ 
Cross-multiplying, we get:
6 * g = 30 * 5 = 150
g = 150/6 = 25
Thus, there are 25 girls, so the answer is A.
Hope this helps!
The answer is and has to be 0 cause if you flip -8+8 then you get 8-8 which equals 0
hope this helps
