Can someone me with the problem in the picture

What is the lcm of 16 and 40 ? 24 and 40 ?

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

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.