Find 3 ratios that are equivalent to the given ratio. 12 to 30
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109.93 lbs
since the quantities vary directly, then
w(moon) = kw(earth ) ← ( k is the constant of variation )
to find k use the given condition
k = w( moon ) / w( earth ) =
given w(earth) = 218.24
w(moon) = = 109.93