Answer:
312 yards
Step-by-step explanation:
No. of balloons = 78
Balloon string to be long = 12 feet
Total string for 78 balloons = 78 x 12
= 936 feet
I yard = 3 feet
Total no. of yards required = 936/3 = 312 yards
Yes
21/3=7
15/3=5
(x+4)^2
