The speedometer needle in a car is 2.5 inches long. When accelerating from 0 to 60 miles per hour the needle sweeps out an arc of 130°. What is the arc length traveled by the needle, in inches? Round your answer to the nearest hundredth. Use 3.14 for \piπ.

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.