Solve this problem using estimation.
a cd sells for $13.95 at music and more. the same cd sells for $15.60 at cd supply. about how much less is the cd at music and more?
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How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid