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The weight​ (in pounds) w=f(d) of an object varies inversely as the square of its distance​ (in thousands of​ miles) d from the center of Earth. a. An astronaut weighs 150 pounds at sea level​ (about 4 thousand miles from​ Earth's center). Find an equation of f. ​f(d)= 2400/d2 b. How much would the astronaut weigh at 11 thousand miles above​ Earth's surface?

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