Mary collected data each day on how many commercials she saw and how long she watched TV. She displayed her data in a scatter plot.


According to the trend line shown in the scatter plot, about how many commercials will Mary see if she watches TV for 112 hours?

A: 19
B: 27
C: 39
D: 90

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.