Can someone me with 19,20,and 21 will mark brainiest for the first answer and it has to be correct

Don't know how to find x given these segment lengths

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.

Calculate the effective quarterly compound interest rate equivalent to a 1% of monthly compound interest rate.