12.56 because
16(3.14)=50.24
12(3.14)=37.68
50.24 - 37.68=12.56
well, the bicycle costs "x" which is the 100% of its price, we know she has 30% thus far, and we also know that that is 66 bucks.

Answer:
Step-by-step explanation:
(3,2),(6,3)
slope = (y2 - y1) /(x2 - x1)
slope = (3 - 2) / (6 - 3) = 1/3
y = mx + b
slope(m) = 1/3
use either of ur points...(3,2)...x = 3 and y= 2
now sub and find b, the y int
2 = 1/3(3) + b
2 = 1 + b
2 - 1 = b
1 = b
so ur equation is : y = 1/3x + 1
Answer:
you would have to contact the company
I believe the percent decrease is 20%
as when you multiply 65.5 by 20%
it gives you 13.1
when you minus 13.1 from 65.50
it gives you $52.4