Question: It takes Jason 30 minutes to cut 1 lawn in his neighborhood. If he cuts 8 yards on both Saturday and Sunday, how many hours does he spend cutting grass?
Answer with step-by-step thinking: He cuts 8 yards on both Saturday and Sunday so that's 2 * 8 = 16 yards. It takes him 30 minutes to cut 1 yard so it takes him 30 * 16 = 480 minutes. There are 60 minutes in 1 hour and it takes him 480 minutes so that's a total of 480 / 60 = 8 hours.
So the answer is 8.

Question: If Stu has 9 books and Albert has 4 times as many books as Stu, how many books do Stu and Albert have in total?
Answer with step-by-step thinking: Albert has 4 * 9 books belonging to Stu = 36 books. So the pair have a combined total of 36 books belonging to Albert + 9 books belonging to Stu = 45 books.
So the answer is 45.

Question: Dr. Jones earns $6,000 a month. His house rental is $640 each month; his monthly food expense is $380; his electric and water bill costs 1/4 of what he makes, and his insurances cost 1/5 of what he makes. How much money does he have left after paying those four bills?
Answer with step-by-step thinking:
Dr. Jones pays $6000 / 4 = $ 1500 for his electric and water bill. He pays $6000 / 5 = $1200 for his insurances. The total amount he pays for the bills and insurances is $1500 + $1200 = $2700. The remaining money from his earning after paying off the bills and insurance is $6000 - $2700 = $3300. The total amount he needs to pay for the rent and food expenses is $640 + $380 = $1020. So, Dr. Jones has $3300 - $1020 = $2280 left.
So the answer is 2280.