Answer:
Step-by-step explanation:
Given that angle A is in IV quadrant
So A/2 would be in II quadrant.
sin A = -1/3
cos A = 
(cos A is positive since in IV quadrant)
Using this we can find cos A/2

Answer:
v=1/x
Step-by-step explanation:
45 cars=454
Divide 45 on both sides to get the average length of a single car
1 car = 10.01 ft
Answer:
8'2
Step-by-step explanation: