[Question]Doris earns $20 per hour by babysitting. She needs to earn at least $1200 for her monthly expenses. She can babysit for 3 hours every weekday and 5 hours on a Saturday. How many weeks does it take for Doris to earn enough to cover her monthly expenses?
[Answer]Doris babysits for a total of 5 weekdays x 3 hours / weekday = 15 hours. She babysits for a total of 15 + 5 = 20 hours in a week. She earns 24 x $20 = $480 in a week. So, it will take $1440 / $480 = 3 weeks to earn Doris needed amount. The answer is 3.
Q: Elsa and her sister watch an opera show every year at Central City Opera. Last year, opera seating cost $85 per ticket. This year, it costs $102. What is the percent increase in the cost of each ticket?
A: The ticket price increase is $102 - $85 = $17. So there is 17 / 85 x 100% = 20% increase of price. The answer is 20.
Question: Jimmy needs to score at least 50 points to pass to the next class. He earned 20 points for each of the 3 exams he wrote but lost 5 points during the school year for bad behavior. How many more points can Jimmy lose and still be able to pass the next class?
Answer: Jimmy earned 20 * 3 = 60 points for the exams he wrote. For bad behavior, he lost 5 points, so he has 60 5 = 55 points left. To pass to the next class, Jimmy needs at least 50 points, so he can lose 55 50 = 5 more points. The answer is 5.
[Question]Every morning Harry takes 15 minutes to buy coffee and a bagel and twice that long to read the paper and eat before going in to work. How long does Harry's morning routine take?
[Answer]First find the time Harry spends eating: 15 minutes * 2 = 30 minutes. Then add the time he spends buying breakfast to find the total time: 30 minutes + 15 minutes = 45 minutes. The answer is 45.
Q: On Miss Lawrence's math exam, 80% of the 50 questions are problem-solving while the rest are multiple-choice questions. How many multiple-choice questions are there?
A: 100% - 80% = 20% of Miss Lawrence's exam are multiple - choice questions. Thus, there are 50 x 20 / 100 = 10 multiple - choice questions. The answer is 10.
Question: Felicia is baking a cake. She needs 2 cups of flour, a cup of white sugar, a 1/4 cup of brown sugar, and a 1/2 cup of oil. Her only measuring scoop is 1/4 cup. How many times does she fill it to complete the measurements?
Answer:
She fills it 8 times for the flour because 2 / (1 / 4) = 8. She fills it 4 times for the white sugar because 1 / (1 / 4) = 4. She fills is 2 times for the oil because (1 / 2) / (1 / 4) = 2. She fills it 1 time for the brown sugar because she needs exactly 1 / 4 of a cup. She fills is 15 times because 8 + 4 + 2 + 1 equals 15. The answer is 15.