Ursula bought five hot dogs at $1.50 each and three salads at $2.50 each. If she had two $10 bills, how much change did she get back? Give the rationale and then the answer.
Let's think step by step. Five hotdogs cost 5 x $1.50 = $7.50. Three salads cost 3 x $2.50 = $7.50. The total cost was $7.50 + $7.50 = $15. And, Ursula had 2 x $10 = $20. Therefore, Ursula got a change of $20 - $15 = $5.. The answer is: 5.

There were 250 balloons in one package. Dante evenly shared the balloons among his 5 friends. Dante changed his mind and asked each of his friends to give him 11 balloons. How many balloons does each friend have now? Give the rationale and then the answer.
Let's think step by step. Balloons divided among 5 friends = 250 / 5 = 50 balloons per friend. Dante took back 11 balloons: 50 - 11 = 39 balloons. Each friend now has 39 balloons.. The answer is: 39.

Jerry wakes up one morning and finds the thermostat set to 40 degrees. He set it to double the initial temperature. His dad notices, yells at Jerry, and reducing the temperature by 30 degrees. Later, Jerry's mother reduces the temperature by 30%, before his sister increases it by 24 degrees. What's the final temperature? Give the rationale and then the answer.
Let's think step by step. First double the initial temperature: 40 degrees * 2 = 80 degrees. Then reduce that amount by 30 to reflect the dad's change: 80 degrees - 30 degrees = 50 degrees. Then multiply that number by 30% to find how much Jerry's mother reduces the temperature: 50 degrees * .3 = 15 degrees. Now subtract 15 degrees from 50 degrees to find the temperature after the mother's change: 50 degrees - 15 degrees = 35 degrees. Finally, add 24 degrees to find the final temperature: 35 degrees + 24 degrees = 59 degrees.. The answer is: 59.