For question 2 it is 15
Because: 4 time 6 is 24 and then you minus 9 which is 15
So there you have it the answer is 15
if you don't have a Unit Circle, this is a good time to get one, you'd need it, you can find many online.
Check the picture below.
There are 7000 ones in 7 thousands
Since 30 times 5= 150, he worked 150 hours for the rest of the week.