Answer:

Step-by-step explanation:
In this problem we have a regular octagonal barrier (That means that all the length side are equal)
Find out the perimeter of the barrier
The perimeter is equal to

where
b is the length side of the barrier
we have

substitute in the formula of perimeter

Convert to mixed number

Answer:
b
Step-by-step explanation:
b is the answer
Answer:
55% of 278 is 152.9
Step-by-step explanation:
Multiple 278 by .55
Answer:
A
Step-by-step explanation:
50-9.75-1.25-1.25=37.75. 1/5 of 50 is 10, so I subtracted 27.75 from 37.75 and got 10.00. The 27.75 made the difference 10.00, so that´s how I got the answer.