If your phone is on 100 percent battery, and you drain 45 percent of it, then charge 22 percent more, how much battery do you have on your phone?

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Proportions in triangles solve for x

42. if 20 men can eat 200 kg of wheat in 40 days, then 10 men can eat 300 kg of wheat in how many days? a) 120 days b) 60 days c) 80 days d) none of these