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**1. The problem statement, all variables and given/known data**

Determine the distance from earth's centre where the force of gravity acting on a space probe is only 11% of the force acting on the same probe at the earth's surface. express your answer in terms of earth's radius,

**2. Relevant equations**

F = Gm1m2/R^2

**3. The attempt at a solution**

i tried plugging in the values but i cant seem to get the answer

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