Answer: b is 6
Step-by-step explanation:
Set the proportions up and solve for b
b. 3
---- = ------
10. 5
0.6.
5/9 = 0.5555555... which rounds to 0.6
D=(S+8)/C
S=DC-8
add 8 to both sides
S+8=DC
divide c from both sides
(S+8)/C=D
Children in their own environment would be a naturalistic observation because the children would be in their natural environment