Q: Janna sleeps 7 hours each day during weekdays and 8 hours each day during weekends. How many hours does she sleep in a week?
A: She sleeps 7 * 5 = 35 hours on weekdays. She sleeps 8 * 2 = 16 hours on weekends. 35 + 16 = 51 hours is the amount of time she sleeps in a week. The answer is 51.

Q: In 2010 the Chicago Bulls won 70 games. The Miami Heat won 5 more games than the Chicago Bulls. How many games did the Bulls and the Heat win together?
A: The Heat won 5 more games than the Bulls so they won 70 + 5 = 75 games. The total games won together is 70 + 75 = 145 games. The answer is 145.

Q: Kira wants some new music on her phone. She downloads 10 songs in the morning. Later on that day, she finds 15 more songs she likes so she downloads them, and at night a friend of hers recommends 3 more songs she also downloads. Knowing that each song has a size of 5 MB, how much memory space in MB will the new songs occupy?
A:
The total number of songs downloaded is 10 songs + 15 songs + 3 songs = 28 songs. The total size of the songs is 28 songs x 5MB / song = 140 MB. The answer is 140.