If karen paints 1/4 of a wall in 1/12 of an hour, what is her unit rate? plx show work: )
a. 1/3 wall per hour
b. 3 walls per hour
c. 8 walls per hour
d. 12 walls per hour

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.