Consider the Q and A. Q: A taco truck buys 100 pounds of beef. They use .25 pounds of beef per taco. If they sell each taco for $2 and each taco takes $1.5 to make how much profit did they make if they used all the beef?
A: 200
What is the step-by-step reasoning process?
Step-by-step reasoning process: They made 100 / .25 = 400 tacos. Each taco gives a profit of 2 - 1.5 = $.5. So they made a profit of 400 * .5 = $200.

Consider the Q and A. Q: There are 516 cars in a parking lot. One-third are blue, one-half are red, and the rest are black. How many black cars are on the lot?
A: 86
What is the step-by-step reasoning process?
Step-by-step reasoning process: Blue = 516 * (1 / 3) = 172 cars. Red = 516 * (1 / 2) = 258. Black = 516 - (172 + 258) = 86. There are 86 black cars on the lot.

Consider the Q and A. Q: Pete has to take a 10-minute walk down to the train station and then board a 1hr 20-minute train to LA. When should he leave if he cannot get to LA later than 0900 hours? (24-hr time)
A: 730
What is the step-by-step reasoning process?
Step-by-step reasoning process: There are 60 minutes in an hour so 1 hour 20 minutes = (60 + 20) minutes = 80 minutes. He will spend a total of 80 + 10 = 90 minutes. 90 minutes is = (60 / 60) hours and 30 minutes = 1 hour 30 minutes = 0130 in 24 - hr time. He has to leave 0130 hours earlier than 0900 i.e. 0900 - 0130 = 0730 hours.

Consider the Q and A. Q: Oscar wants to train for a marathon. He plans to add 2/3 of a mile each week until he reaches a 20-mile run. How many weeks before the marathon should he start training if he has already run 2 miles?
A: 27
What is the step-by-step reasoning process?
Step-by-step reasoning process:
Oscar needs to increase his maximum running time from 20 - 2 = 18 miles. Oscar will need a total of 18 / ( 2 / 3 ) = 27 weeks to prepare.