For this case we have that by definition, the area of a rectangle is given by:

Where:
w: Is the width of the rectangle
l: is the length of the rectangle
Each of the girls has 24 feet of fencing, that is, the perimeter is 
Amy:

Thus, Amy's fence area is: 
Zach:

Thus, the area of Zach's fence is:
Answer:
Amy's garden has a greater area
, is
greater
18 x 4 = 72
(9 x 2) x 4 = 72
9 x (2 x 4) = 72
Answer:
2 pounds
Step-by-step explanation:
pounds of white candy: 8.25 - (2.5 + 3.75) = 8.25 - 6.25 = 2