Question: Jack buys a squat rack for $2500. The barbell cost 1/10 as much. How much did he pay for everything?
Answer with step-by-step thinking: The barbell cost 2500 / 10 = $250. So he paid 2500 + 250 = $2750 for everything.
So the answer is 2750.


Question: A water tank has a capacity of 4000 gallons. Mack connects a pipe to the tank that fills the tank with water at the rate of 10 gallons per hour. How long will it take to fill the tank to 3/4 of its capacity?
Answer with step-by-step thinking: 3 / 4 of the water tank is 3 / 4 * 4000 = 3000. If the pipe fills the tank with water at the rate of 10 gallons per hour, it will take 3000 / 10 = 300 hours to fill the tank to 3 / 4 of its capacity.
So the answer is 300.


Question: John decides to trade in his stereo system. His old system cost 250 dollars and he got 80% of the value for it. He then buys a system that costs $600 that he gets a 25% discount on. How much money came out of his pocket?
Answer with step-by-step thinking:
He got 250 * .8 = $200. He gets a 600 * .25 = $150 discount on the second system. So it cost 600 - 150 = $450. So he was 450 - 200 = $250 out of pocket.
So the answer is 250.