Answer:
11.36
Step-by-step explanation:
A=1/2*b*h
62.5=1/2*11*x(height)
62.5= 1/2*11*x
62.5=5.5*x
X=62.5/5.5
=11.36
80 * 70 percent = cookies sold
80 * .7 = cookies sold
56 = cookies sold
42 is an area
X=±8
x²=64
x²=8²
X=±✓8²
