[Question]The ratio of boys to girls in a classroom is 3:5. If there are 4 more girls than boys, how many students are in the classroom?
[Answer]Since the ratio of boys to girls is 3:5, then the class is divided into 3 + 5 = 8 parts. The girls have 5 - 3 = 2 parts more than the boys. Since 2 parts are equal to 4, then 1 part is equal to 4 / 2 = 2 students. Hence, there are 8 parts x 2 = 16 students. The answer is 16.
Q: Beth is a scuba diver. She is excavating a sunken ship off the coast of a small Caribbean island and she must remain underwater for long periods. Her primary tank, which she wears when she first enters the water, has enough oxygen to allow her to stay underwater for 2 hours. She also has several 1-hour supplemental tanks that she takes with her as well as stores on the ocean floor so she can change tanks underwater without having to come up to the surface. She will need to be underwater for 8 hours. How many supplemental tanks will she need?
A: For an 8 - hour dive, she will use her 2 - hour primary tanks and will need supplemental tanks for 8 - 2 = 6 additional hours. Since each supplemental tank holds 1 hour of oxygen, for 6 hours she will need 6 / 1 = 6 supplemental tanks. The answer is 6.
Question: On Tuesday, 12,000 ice cream cones were sold. On Wednesday, the number of ice cream cones sold was double the amount sold on Tuesday. How many ice cream cones have been sold in total?
Answer: 12,000 * 2 = 24,000 ice cream cones were sold on Wednesday. 12,000 + 24,000 = 36,000 ice cream cones have been sold in total. The answer is 36000.
[Question]Mark needs to replace the radiator in his car. The work takes 2 hours and the mechanic charges $75 an hour. The part cost $150. How much did he pay?
[Answer]He had to pay for 2 hours of labor, which cost 2 * $75 = $150. So the total cost was $150 + $150 = $300. The answer is 300.
Q: A roll of 25 m wire weighs 5 kg. How much does a 75 m roll weigh?
A: We know that the 75 m roll is three times bigger than the 25 m roll because 75 m / 25 m = 3. This means the 75 m roll weighs 3 times more than the 25 m roll: 5 kg * 3 = 15 Kg. The answer is 15.
Question: Aria has twice as many high school credits as Emily, who has twice the number of high school credits as Spencer. If Emily has 20 credits, what's twice the total number of high school credits the three have?
Answer:
If Emily has 20 credits, and Aria has 2 times as many, then Aria has 2 * 20 = 40 high school credits. Emily has twice the number of high school credits Spencer has, meaning Spencer has 20 / 2 = 10 high school credits. Altogether, the three have 40 + 20 + 10 = 70 high school credits. Twice the total number of high school credits the three have is 2 * 70 = 140. The answer is 140.