PLEASE HELP ASAP Find the length of the arc.

Answer Options:

A. 9π/2 km

B. 9π/3 km

C. 539π/12 km

D. 18π km

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.