Let f(x)=x^2+1 and g(x)=x^4-1. find f•g. a)x^4+x^2-1 b)x^6-x^2-1 c)x^8+x^4-x^2+1 d)x^6+x^4-x^2-1

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.