Parabolic Telescope. The Arecibo radio telescope in Puerto Rico has an enormous reflecting surface or radio mirror. The huge "dish" is 1000 feet in diameter and 167 feet deep and covers an area of...

Extracted text: Parabolic Telescope. The Arecibo radio telescope in Puerto Rico has an enormous reflecting surface or radio mirror. The huge "dish" is 1000 feet in diameter and 167 feet deep and covers an area of about 20 acres. Using these dimensions, determine the focal length of the telescope.(round off to the nearest hundredths) FOCAL LENGTH: Blank 1 feet