<h2>
86 yards of string is required</h2>
Step-by-step explanation:
Juan wants each balloon string to be 6 feet long.
Number of balloons bought = 43
Length of string = 6 feet
Total length of string required = 43 x 6 = 258 feet
Given that
86 yards of string is required
The sum of the first four composite numbers is 27. ( 4+6+8=9)