+129849 3. We have that
18 * [ r ]^2 = 8 divide both sides by 18
r^2 = 8/18 = 4/9
r^2 = 4/9
r = √[ 4/ 9] = 2/3
So
The length of the second arc is
18 (2/3) = 12 ft
4. A little tricky, NSS
We have that
1250 * r^2 = 50 divide both sides by 1250
r^2 = 50/1250 = 1/25
r = √(1/25) = 1/5
So.....the second term is
1250 (1/5) = 250
