Answer:
7839 yards
Step-by-step explanation:
Francesca wants each balloon string to be 9 feet long.
She wants to get 67 balloons.
The total length of string she will need (in feet) is:
67 * 9 = 603 feet
The store sells string by the yard.
1 foot = 13 yards
Hence, the length of string she will need in yards will be:
603 * 13 = 7839 yards
She will need 7839 yards of string.
