8 15 17 i think no clue really

Question 11 :
the equations are :
now, let's graph the lines ~
As you can see in the attachment, The lines coincides each other, so the equations are :
Answer:
The decimal form of 3/5 is .6 or .60 and the percent form is 60%.
The fraction form of 0.3 is 30/100 or 3/10 and the percent form is 30%.
The decimal form of 3/20 is .15 and the percent form is 15%.
The fraction form of 0.58 is 58/100 or 29/50 and the percent form is 58%.
The decimal form of 19/50 is .38 and the percent form is 38%
c = 2 × 14.6 × π = 29.2 × 3.141592 = 91.7344864 ≈ 91.7
Correct anawer: B