14. a. Sketch Step 4. Step 1
Step 2
Step 3
Step 4
b. Complete the table
1
2
3
4
5
...20
Step # (x)
# of toothpicks (V)

Problem 14, I have no idea what’s going on..

From question, we have,
length = w + 7mm
perimeter > 62 mm
=> 2(length + width) > 62 mm
=> 2(w + 7 mm + w) > 62 mm
=> 2(2w + 7 mm) > 62 mm
=> 4w + 14 mm > 62 mm
=> 4w > 62 mm - 14 mm
=> 4w > 48 mm
=> w > 48 mm / 4
=> w > 12 mm
therefore, width > 12 mm
now,
length = w + 7 mm
length > 19 mm
Hence length > 19 mm and width > 12 mm