Brandon sights a helicopter above a building that is 200 feet away at an angle of elevation of 30 degrees. to the nearest foot, how high above the ground the is the helicopter

For this case what you should know is that you should model the problem as a triangle with a right angle.
 We then have the following trigonometric relationship:
 Tan (30) = y / 200
 Clearing the value of and we have:
 y = 200 * tan (30)
 y = 115.4700538
 Nearest foot:
 y = 116 feet.
 
 the helicopter is 116 feet above the ground