Step-by-step reasoning process: In two years, Lennon will be 2 + 8 = 10 years old. Ophelia will be 4 * 10 = 40 years old in two years. Currently, Ophelia is 40 - 2 = 38 years old.
[Q & A] The question is In two years, Ophelia will be four times as old as Lennon. If Lennon is currently eight years old, how old is Ophelia?
The answer is 38

Step-by-step reasoning process: We have 60 minutes per hour. So, in 24 hours we have 60 * 24 = 1440 minutes. So, the volume of air Ross inhaled in 24 hours is: 17 breaths / minute * 5 / 9 L / breath * 1440 minutes = 122400 / 9 = 13600 liters. The volume of air inhaled is 13600 liters.
[Q & A] The question is Ross takes 17 breaths per minute by inhaling 5/9 liter of air to his lungs. What is the volume of air inhaled in 24 hours?
The answer is 13600

Step-by-step reasoning process: The number of students who wish to go on the skiing trip is 2 * 4000 students = 8000 students. The total number of students is 4000 students + 8000 students = 12000 students.
[Q & A] The question is The number of students who wish to go on a skiing trip is twice as many as those who wish to go on a scavenger hunting trip. If there are 4000 students who wish to go on the scavenger hunting trip, how many students are there altogether?
The answer is 12000

Step-by-step reasoning process: Rebecca will make 30 * 4 = $120 from haircuts today. She will make 60 * 2 = $120 from dye jobs. She will spend 10 * 2 = $20 on hair dye. With the $40 perm and tips, at the end of the day, Rebecca will have 120 + 120 + 40 - 20 + 50 = $310.
[Q & A]
The question is Rebecca runs a hair salon. She charges $30 for haircuts, $40 for perms, and $60 for dye jobs, but she has to buy a box of hair dye for $10 to dye every head of hair. Today, she has four haircuts, one perm, and two dye jobs scheduled. If she makes $50 in tips, how much money will she have in dollars at the end of the day?
The answer is 310