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What are the first 4 terms in the multiplication pattern given by the formula 2×4n

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

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.