Answer:
54 feet of yarn
Explanation:
We have a conversion rate of
1 yard = 3 feet
Sarah has 4 pieces of yarn that are 6 yards each.
Hence,
1 yard = 3 feet
6 yards = x
Cross Multiply
x = 6 × 3 feet
x = 18 feet
Therefore, 4 pieces of yarn are 18 feet each
Hence, total feet of yarn above = 4 × 18 feet = 72 feet
She uses 9 pieces of yarn that are each 2 feet long.
Total feet of yarn here is:
9 × 2 feet = 18 feet of yarn
Therefore, the amount of yarn Sarah have left is calculated as:
72 feet - 18 feet
= 54 feet of yarn