Answer:
Option A 
Step-by-step explanation:
4 infants + 11 toddlers = 15 children
4 infants / 15 children = 
The answer is 13 ft because 39 times 4 is 156 and 156 divided by 13 is 12
Answer:
No.
Step-by-step explanation:
No, Bob is not correct.
The formula he's using is the following:

The important thing here is that the angle is between the two sides.
In the given triangle, 120 is not between 8 and 18. Therefore, using this formula will not be valid.
Either Bob needs to find the other side first or find the angle between 8 and 18.
Answer:
2 3/8
Step-by-step explanation: