I believe the length of the fence is 640. (Don't count on my answer, it may not be right).
Answer: i think it is 1/5
The answer is B because supplementary angles add up to 180 degrees
.45*10^4=4500
^ is the usual symbol for powers
40%=0.4
0.4+1=1.4
4.5(1.4)=6.3
The answer is $6.30
