Question: 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?
Answer: 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]In January the families visiting a national park see animals 26 times. In February the families that visit the national park see animals three times as many as were seen there in January. Then in March the animals are shyer and the families who visit the national park see animals half as many times as they were seen in February. How many times total did families see an animal in the first three months of the year?
[Answer]Animals were seen 26 times in January and three times as much in February, 26 x 3 = 78 times animals were seen in February. In March the animals were seen 1 / 2 as many times as were seen in February, 78 / 2 = 39 times animals were seen in March. If animals were seen 26 times in January + 78 times in February + 39 times in March = 143 times animals were seen in the first three months of the year. The answer is 143.
Q: A car traveled 360 miles in 4 hours and 30 minutes. What was its speed in miles per hour?
A: There are 60 minutes in one hour, so the car traveled 360 miles in 4 hours + 30 minutes / 60 minutes / hour = 4.5 hours. In one hour, the car travels 360 miles / 4.5 hours = 80 miles / hour. The answer is 80.
Question: The bowling alley has 30 red bowling balls. There are 6 more green bowling balls than red. How many bowling balls are there in total?
Answer: There are 30 + 6 = 36 green bowling balls. In total there are 30 + 36 = 66 bowling balls. The answer is 66.
[Question]Bridgette has 2 dogs, 3 cats, and 4 birds. She gives the dogs a bath twice a month. She gives the cats a bath once a month. She gives the birds a bath once every 4 months. In a year, how many baths does she give?
[Answer]Each dog gets 24 baths a year because 2 x 12 = 24. Each cat gets 12 baths a year because 1 x 12 = 12. Each bird averages .25 baths per month because 1 / 4 = .25. Each bird gets 3 baths a year because .25 x 12 = 3. She gives 48 dog baths because 2 x 24 = 48. She gives 72 cat baths because 3 x 12 = 36. She gives 12 bird baths a year because 4 x 3 = 12. She gives 132 baths a year because 48 + 36 + 12 = 96. The answer is 96.
[Question]Ross takes 17 breaths per minute by inhaling 5/9 liter of air to his lungs. What is the volume of air inhaled in 24 hours?
[Answer]
We have 60 minutes per hour. So, in 24 hours we have 60 * 24 = 1440 minutes. So, the volume of air Ross inhaled in 24 hours is: 17 breaths / minute * 5 / 9 L / breath * 1440 minutes = 122400 / 9 = 13600 liters. The volume of air inhaled is 13600 liters. The answer is 13600.