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If you triple the length of each side of a cube, its surface area increases by what factor? Need help answering this math problem.? Vector A makes an angle of 20° and B makes an angle of 110° with the x axis. The magnitudes of A= 20 mag of b = 30. Find angle of resultant? Card number? The height at which the acceleration due to gravity becomes g/9. in terms of r, radius of the earth is?