Answer:
First, we need to convert the length of the leather cord to inches because the length of the necklace is given in inches.
3 yards = 3 x 3 = 9 feet (since there are 3 feet in a yard)
9 feet = 9 x 12 = 108 inches (since there are 12 inches in a foot)
Now we can divide the length of the leather cord by the length of each necklace:
108 inches ÷ 28 inches = 3.857
Since we cannot make a fraction of a necklace, we round down to the nearest whole number:
3 necklaces
Therefore, Cindy can make 3 necklaces with the piece of leather cord she has.