30 ! select all of the expressions that are equivalent to 4 square root of 5. a. 2 square root of 20. b. 6^1/2-5^1/2 c. 3*5^1/2+5^1/2 d. 4* 5^1/2 e. 2 square root of 10 f. 3*5^1/2

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.