Raymond developed an app for smartphones. During the first week, he had 7,040 downloads from girls and 3 times as many downloads from boys. Of the boys who downloaded the app, only one out of eight bought the full version of the app for $5. Which calculation yields the number of boys who bought the full version of the app? A) 7,040 * 5, then 35,200 : 3 B) 7,040 * 5, then 35,200 : 8 C) 7,040 * 8, then 56,320 : 3 D) 7,040 * 3, then 21,120 : 8 E) 7,040 * 5, then 35,200 : (3 * 8)

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Mathematics

12 April, 14:00

Raymond developed an app for smartphones. During the first week, he had 7,040 downloads from girls and 3 times as many downloads from boys. Of the boys who downloaded the app, only one out of eight bought the full version of the app for $5. Which calculation yields the number of boys who bought the full version of the app? A) 7,040 * 5, then 35,200 : 3 B) 7,040 * 5, then 35,200 : 8 C) 7,040 * 8, then 56,320 : 3 D) 7,040 * 3, then 21,120 : 8 E) 7,040 * 5, then 35,200 : (3 * 8)

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Milagros Dillon · Answer 1

The correct calculation is D. 7,040 * 3, then 21,120 : 8

Step-by-step explanation:

1. Let's review the information provided to us to answer the question correctly:

Number of downloads from girls = 7,040

Number of downloads from boys = 3 times as many

Number of boys who downloaded and paid the full version = 1 out of 8

2. Which calculation yields the number of boys who bought the full version of the app?

Number of downloads from boys = 3 * 7,040

Number of downloads from boys = 21,120

Number of boys who downloaded and paid the full version = 21,120/8 = 2,640

The correct calculation is D. 7,040 * 3, then 21,120 : 8