Answer:
3
Step-by-step explanation:
As the CD line is parallel to x-axis hence the separation or length is measured on the x-axis i.e.
the length of CD = length of C - length of D = 7 - 4 = 3
Answer:
132 
Step-by-step explanation:
Triangle formula is 1/2 bh (4x3/2) is 6 (4 triangles)=24
Base is 6x8=48
sides are 6x5=30 then multiply by 2 of the sides =60
add all together
Since the deepest point of Death Valley is below sea level, its altitude is negative. So, the difference between the altitudes is

Subtracting a negative means to add, so we have

Answer: 72 ft
Step-by-step explanation:
Given
The width of a post is 
Posts are separated by
chain
for 2 posts, length is 
for 3 posts, length is 
for 4 posts, it is 
i.e. 11 ft is adding on the addition of another post
for 7 posts it is 
Thus, the total length of the fence is 
assuming the maximum is the most common occurred, the answer is 32
assuming the minimum is the smallest number, it is 8