Answer:
7/5
Step-by-step explanation:
To find the slope, we can use the slope formula
m = (y2-y1)/(x2-x1)
= ( 9-2)/(6-1)
= 7/5
0.10x - 0.08x = 250 - 185
0.02x = 65
x = 3250
Let's do it in general first; inner radius r, outer radius R.
Little circumference is 2πr, bigger is 2πR, difference is
d = 2π(R-r)
For us R-r = 2 feet so that's
d = 2 (22/7) (2) = 88/7 ≈ 12.57 feet
Answer: 12.6
