Ineed with #12 and i have clue what to do

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.

Lines b and c are parallel. what is the measure of 2? m2 = 31° m2 = 50° m2 = 120° m2 = 130°