4. You get an estimate to paint your house of $2850. You were told that this is 18% below last years cost what was last years cost?

i have no clue what you just said. write a question in english?

arc length = radius * x ( in radians)

6 * pi = 18 * x

divide by 18 on each side

6 pi / 18 = x

pi/3 = x

the angle is pi / 3 radians

or   60 degrees