The longest distance between any two vertices is:

           2:1 x 3=6(ft)=6 x 0,3048=1,8288≈1,83 m

Answer:1,83 m

We have: 13 =2+11=3+10=5+8=7+6=13+0=3 +3 +7

So the number need find is:3 x 3 x 7=63

Answer:63

We have diagrams:

Barbara's cell phone bill :|____|____|____|____|____|____|____|

Tina's cell phone bill      :|____|____|____|____|____|

Equal parts of Barbara's cell phone bill minus equal parts Tina's cell phone bill is:

            7-5=2(equal parts)

Barbara's bill is:

             14:2 x 7=49

The length of this market on the map is:

    128,5 x 1:5000=0,0257(m)=2,57 (cm)

               Answer:2,57 cm