Raise c to the 8th power!​

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.

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a