A young sumo wrestler decided to go on a special high-protein diet to gain weight rapidly. He gained
weight at a rate of 5.5 kilograms per month. After 11 months, he weighed 140 kilograms.
Let W represent the sumo wrestler's weight (in kilograms) after t months.
Complete the equation for the relationship between the weight and number of months.

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.