Answer:
Step-by-step explanation:
Given that Arthur and Hannah complete 18 and 9 questions per day for 5 days, respectively, you want to know the number each completes in 5 days, and the total number completed in 5 days.
If Arthur completes 18 questions on each of 5 days, the total number he completes is ...
18 · 5 = 90 . . . . questions in 5 days
If Hanna completes 9 questions on each of 5 days, the total number she completes is ...
9 · 5 = 45 . . . . questions in 5 days
The total number of questions Arthur and Hannah will complete is ...
90 +45 = 135 . . . . questions in 5 days