Anew alloy is made by mixing 72 grams of iron with 9 grams of zinc. how many grams of iron are required to make the alloy when combined with 144 grams of zinc?
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1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

Find the quotient with the restriction.