With her promotion, nicki's salary increased from $19.50 an hour to $22.50 an hour. what is the percent of increase, rounded to the nearest whole number? a. 9% b. 15% c. 18% d. 22%

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.