book Maths Puzzle Numerical Ability

find the exact value, leaving the answer in a proper form of tan 240 degrees.

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book Other Question

3x^2=11x+4
Solve by using quadratic formula Points A,B,C and D lie on the same line and in that order. The ration of AB to AC is 1/4 and the ration of BC is 1/2. Find the ratio of AB to CD.

I have no idea how to even start!