[Question]Marta is weighing fruit at the grocery store. The apples weigh four ounces each and the oranges weight 3 ounces. Each plastic bag in the grocery store can hold 49 ounces of fruit before it splits. If Martha wants to put an equal number of apples and oranges in each bag, and she wants to buy 3 full bags of fruit, how many ounces of apples should she buy?
[Answer]First figure out how many ounces of fruit fit in three bags by multiplying the number of bags by the number of ounces per bag: 49 oz / bag * 3 bags = 147 oz. Since Marta wants the same number of apples and oranges in each bag, we know the fruits always come in pairs. Find the weight of each pair of fruit by adding the weight of one apple to the weight of one orange: 3 oz + 4 oz = 7oz. Now figure out how many pairs of fruit Marta needs to fill the bags by dividing the total weight in the bags by the weight of each pair of fruit: 147 oz / 7 oz = 21. Now multiply the number of apples Marta needs to buy (21) by the weight per apple (4 oz) to find how many ounces she should buy: 21 * 4 oz = 84 oz. The answer is 84.
Q: Jo-Bob hopped into the hot air balloon, released the anchor rope, and pulled on the lift chain, which ignited the flame and provided the warm air that caused the balloon to rise. When the lift chain was pulled, the balloon would rise at a rate of 50 feet per minute. But when the chain was not being pulled, the balloon would slowly descend at a rate of 10 feet per minute. During his balloon ride, he pulled the chain for 15 minutes, then released the rope for 10 minutes, then pulled the chain for another 15 minutes, and finally released the chain and allowed the balloon to slowly descend back to the earth. During his balloon ride, what was the highest elevation reached by the balloon?
A: The first 15 - minute chain pull caused the balloon to rise 50 * 15 = 750 feet. Releasing the chain for 10 minutes caused the balloon to descend 10 * 10 = 100 feet. The second 15 - minute chain pull caused the balloon to rise another 50 * 15 = 750 feet. Thus, at the end of the second chain pull, when the balloon was at its highest elevation, the balloon had risen to an elevation of 750 - 100 + 750 = 1400 feet above the earth's surface. The answer is 1400.
Question: Mr. Desmond bought three times as many toys for his younger son as he bought for his elder son. If the elder son received 60 toys, how many toys did Mr Desmond buy?
Answer: The younger son received three times as many toys as the elder son, which is 3 * 60 = 180 toys. Since he bought the toys together, he purchased 180 + 60 = 240 toys. The answer is 240.
[Question]A plane takes off at 6:00 a.m. and flies for 4 hours from New York City to Chicago. The plane stays at the port in Chicago for 1 hour and then departs for Miami. If the aircraft took three times as many hours to fly to Miami than it took to fly from New York to Chicago, calculate the total time to travel from New York to Miami.
[Answer]Before departing for Miami from Chicago, the total time the plane had taken for the journey is 4 + 1 = 5 hours. It took 3 * 4 = 12 hours to fly to Miami. . The total flying time from New York to Miami is 12 + 5 = 17 hours. The answer is 17.
Q: Perry made a recipe that serves four people. He added a half cup of cream at the end. Cream has 88 grams of fat per cup. How many grams of fat were added to each serving of food?
A: Perry added 88 / 2 = 44 grams of fat to the recipe. Thus, he added 44 / 4 = 11 grams of fat to each serving of food. The answer is 11.
Question: Dina has twice as many dolls as Ivy. 2/3 of Ivy's dolls are collectors editions. If Ivy has 20 collectors edition dolls, how many dolls does Dina have?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Ivy has 20 / 2 * 3 = 30 dolls. Dina has 30 * 2 = 60 dolls. The answer is 60.