Answer: 
<u>Step-by-step explanation:</u>
"At least one girl" means P(1 girl) + P(2 girls) + P(3 girls) or 1 - P(all boys)
I will use the latter: 1 - P(all boys)
P(all boys) = 

Answer:
I think positive
Step-by-step explanation:
Answer:
13 1/2 hours
Step-by-step explanation:
4/6=9/x then find the rate and solve
Answer:
20 mm
Step-by-step explanation:

Answer:
5
Step-by-step explanation:
They are different by 5 percantages