The Lovell Telescope is a radio telescope located at the Jodrell Bank Observatory in Cheshire, England. The dish of the telescope has the shape of a paraboloid with a diameter of 240 feet. The distance from the vertex of the dish to its focus is 85 feet. The surface area of a paraboloid with radius r and depth d is given by . Approximate (to the nearest 100 square feet) the surface area of the radio telescope.
A) 118,900 ft2
B) 63,300 ft2
C) 50,500 ft2
D) 186,500 ft2
E) 50,500 ft2.
Correct Answer:
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