Answer:
30.6
Step-by-step explanation:
A = b*h
where b is the base, h is the height and A is the area
856.8 = b*28
Divide each side by 28
856.8/28 = 28b/28
30.6 =b
7+6+3+4=20 total basketballs
probability=7/20=7*5/100=35 /100=35%