Answer:
Step-by-step explanation:
They are closed under addition, subtraction and multiplication.
Answer:
D)the time (in hours) a 4-year-old spends unsupervised per day
Step-by-step explanation:
Given that 4-year-olds in a certain country average 3 hours a day unsupervised and that most of the unsupervised children live in rural areas, considered safe
X - the time (in hours) a 4-year-old spends unsupervised per day
X is N(3,1.8)

Answer:
ok ill try my best
Step-by-step explanation:
1. 1/36
2.1/18
3. 25/36
4. 5/18
hope this helps
Answer:
1/8
Step-by-step explanation:
First you need to know what the annual or monthly income is.