keisha decides to roll a number cube until she gets a 6. let x= the number of rolls until she rolls a 6. what is the probability that keisha gets her first 6 on or after her 2nd roll?

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units