exam Maths Puzzle Numerical Ability

Please help!

the 4th root of 3s^2t^4 (numerator)
10,000 (denominator)

I don't even know where to begin.

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exam Other Question

11. a(rs)8- 3(rs)2a^2 the measure of the supplement of an angle is 30 degrees less than 5 times the measure of the compliment find 2/5 the measure of the compliment