Question

Precalculus help

Answer 1

s=r0 where s= 40 R = ? and 0 = 20 degrees
Its not zero is theta

Answer 2

Convert the angle to radians, then plug the numbers into the formula. Are you looking for an exact answer or from a calculator?

Answer 3

Fractions would be nice , im just looking how to work out the problem because i have the answer. Theres also an explanation but i dont understand it at all.
http://www.slader.com/textbook/9780321356932-precalculus-graphical-numerical-algebraic-7th-edition/356/section-41-exercises/31/

Answer 4

s = rΘ is the general formula for arc length, but the angle has to be in radians, not degrees.

Multiply 20° by \(\frac{ \pi }{ 180 }\) to convert the angle to radians. You should get π/9 for this step.

then plug into the formula.

40 = r(pi/9)
\[r=\frac{ 40 }{ \frac{ \pi }{ 9 } }\]
r = 360/π