Here is Elena’s work for finding the surface area of a rectangular prism that is 1 foot by 1 foot by 2 feet. She concluded that the surface area of the prism is 296 square feet. Do you agree with her conclusion? Explain your reasoning.

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.