Question: Kalani has twenty candles in her bedroom, twice the number of candles in the living room. Donovan, her brother, brings in 20 more candles he bought from the candle shop. What's the total number of candles in the house?
Answer: Step-by-step reasoning process: If the number of candles in the bedroom is twice the number in the living room, there are 20 / 2 = 10 candles in the living room. When Donovan brings in 20 more candles, the total number of candles becomes 10 + 20 + 20 = 50.
So the answer is 50.

Question: Nina has two pairs of shoes. She bought one of them for $22, and the second one was 50% more expensive. How much did Nina pay for both pairs of shoes?
Answer: Step-by-step reasoning process: The second pair of shoes was 50 / 100 * 22 = $11 more expensive. That means that the second pair's price was 22 + 11 = $33. So for both pairs of shoes, Nina paid 33 + 22 = $55.
So the answer is 55.

Question: Freddy is 2 years younger than Stephanie. Stephanie is 4 times as old as Job. If Job is 5, how old is Freddy?
Answer: Step-by-step reasoning process: Stephanie is 5 * 4 = 20 years old. Freddy is 20 - 2 = 18 years old.
So the answer is 18.

Question: A boy runs 1.5 km in 45 minutes. What is his speed in kilometers per hour?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Step-by-step reasoning process: Since 1 hour is equal to 60 minutes, then 45 minutes is equal to 45 / 60 = 0.75 hours. Then, the speed in kilometers per hour is 1.5 km / 0.75 hour = 2 kilometers per hour.
So the answer is 2.