very quickly please i need help right now

#5. The world's fastest roller coaster is at Six Flags Magic Mountain. At the start, riders are shot forward and then up
a tower. They then begin the backward descent. The cars reach speed of 160 km/h in 7 seconds during the descent.
From a point 100 metres from the foot of the tower, the angle of elevation to the top of the tower is 52º. Find the height of the tower, to the nearest metre.

#9. Edmonton's CN Tower is a high-rise office building. From a point 35 metres from the base of the building and level with the base, the angle of elevation of the top is 72.5".
a) Find the height of Edmonton's CN Tower, to the nearest metre. b) Toronto's CN Tower is a tourist attraction with a height of 555 metres. How many times as tall as Edmonton's CN Tower is Toronto's CN Tower?
c) Edmonton's CN Tower has 27 storeys. If an office building were the height of Toronto's CN Tower, how many storeys would you expect it to have? Explain.

#12. This question involves you personally!
a) When you are standing, what is the height of your eyes above the ground, to the nearest centimetre? b) Calculate the angle of depression, to the nearest degree, you would use to look at a point on the ground 5 metres in front of you.
c) Would the answer to part b) be greater or less for a person taller than you? Explain.​