The first one is correct I think.
Answer:
length times hight times whith
The temperature at 10 pm is -3 degrees
Vertical angles are equal
5x - 40 = 3x + 8
5x - 3x = 8 + 40
2x = 48
x = 48/2
x = 24
m∠ABC = 3x + 8 = 3 * 24 + 8 = 80°
(or m∠ABC = 5x - 40 = 5 * 24 - 40 = 80°)
The problem says that 2500 people went, out of all the answers choices which choice gives you the total of 2500 when you add the adults and children.
Answer is B because 1100 + 1400 = 2500