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Mathematics 8 Online
OpenStudy (anonymous):

Hooke's Law. The distance d when a spring is stretched by hanging object varies directly as the weight w of the object. If the distance is 30cm when the weight is 3kg, what is the distance when the weight is 8kg?

OpenStudy (curry):

80

OpenStudy (saifoo.khan):

use the Ratio method.

OpenStudy (saifoo.khan):

bcz this is directly prop

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