How do I write the expression using exponents.8⋅w⋅w⋅w⋅w

In the diagram of circle o, what is the measure of zabc?

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"

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.