Answer: 
Step-by-step explanation:
For this exercuse you need to analize the information provided. You know that:
1) The height of the replica of the Empire State Building with its antenna spire in Las Vegas is 485 feet.
2) The height of the real Empire State building is 1,454 feet.
Finally, in order to find the ratio of height of the replica to the height of the real Empire State building, its necessary to divide the height of the replica of the Empire State Building by the height of the real Empire State building.
Therefore, trough this procedure you get that the ratio of height of the replica to the height of the real Empire State building is:

(This fraction cannot be reduced)
660sec in 3 days.
So 220sec per days
220•5= 1100
1100sec = 18min and 30 second.
Ans:
18min and 30 sec
The angles all add up to 180
42 + 42 + x = 180
84 + x = 180
x = 96
x = the third angle