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question:John buys 1.5 ounces of silver and twice as much gold. The silver costs 20 per ounce. The gold is 50 times more expensive per ounce. How much does he spend on everything?
answer:John buys 1.5 ounces of silver, so he spends 1.5 * 20 = <<1.5*20=30>>30 on silver. He buys twice as much gold as silver, so he buys 1.5 * 2 = <<1.5*2=3>>3 ounces of gold. Gold is 50 times more expensive per ounce than silver, so it costs 20 * 50 = <<20*50=1000>>1000 per ounce. Therefore, he spends 1000 * 3 = <<1000*3=3000>>3000 on gold. In total, John spends 30 + 3000 = <<30+3000=3030>>3030 on everything. 3030 The answer is: 3030
question:Tim won a 100 raffle. He gave away 20% to his friend. How much did he keep?
answer:Tim gave away 20% of 100, which is 0.20 * 100 = 20 So he kept 100 - 20 = 80 80 The answer is: 80
question:Quantities r and s vary inversely. When r is 1200, s is 0.35. What is the value of s when r is 2400? Express your answer as a decimal to the nearest thousandths.
answer:Since r and s vary inversely, we know that rs=k for some constant k. We can solve for k by plugging in the given values: 1200(0.35)=k, so k=420. Now, we can use this value of k to find s when r is 2400: frac{2400s}{420}=1. Solving for s, we get s=frac{420}{2400}=boxed{0.175}. The answer is: 0.175
question:f John's dog has a litter of 8 puppies and he gives away half of them, keeps one, and sells the rest for 600 each, but also has to pay the stud owner 300, what is the total profit he makes?
answer:John's dog has a litter of 8 puppies, and he gives away half of them, so he gives away 8/2 = 4 puppies. He keeps one puppy for himself, so he now has 8 - 4 - 1 = 3 puppies left to sell. He sells each puppy for 600, so he makes 3 * 600 = 1800 from selling the puppies. However, he also has to pay the stud owner 300, so his total profit is 1800 - 300 = 1500. 1500 The answer is: 1500