December 16, 2009
My online math class doesnt explain this so can someone please help me!
From a point 450 ft from the base of a building, the angles of elevation of the top and bottom of a flagpole on top of the building have measures 60° and 55°. Find the height of the flagpole to two significant digits.
A)140 ft B)120 ft C) 110 ft D)130 ft
The angle of elevation is 19°20' from a ship at sea to the top of a 159 ft lighthouse. Find, to three significant digits, the distance of the ship from the base of the lighthouse.
A)354 ft B) 453 ft C) 226 ft D)536 ft
The length of the longer leg of a right triangle is 2 more than twice the length of the shorter leg. The length of the hypotenuse is 1 more than the length of the longer leg. Find the measure, to the nearest degree, of the angle between the shorter leg and the hypotenuse.
A)67 B)54 C)32 D) 81