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Mathematics 20 Online
OpenStudy (anonymous):

An astronaut weighs 170 pounds on Earth but only 68 pounds on Mars. While visiting the planet, the astronaut removes a rock sample that weighs 25 pounds on Mars. What is the weight of the rock sample on Earth?

OpenStudy (perl):

you can do a proportion

OpenStudy (perl):

170/68 = x / 25

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