2 Earth TT John Glenn's orbit in Friendship 7 2
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On February 20, 1962, John Glenn made the first U.S.-manned flight around the Earth for three orbits on Friendship 7. With Earth at one focus, the orbit of Friendship 7 is given approximately by r =4090.76/(1 - 0.0076 cos θ),where r is measured in miles from Earth’s center. Use the formula and the figure shown to solve:How far from Earth’s center was John Glenn at his greatest distance from the planet? Round to the nearest mile. If the radius of Earth is 3960 miles, how far was he from Earth’s surface at this point on the flight?
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