exam Maths Puzzle Numerical Ability

The period of vibration P for a pendulum varies directly as the square root of the length L. If the period of vibration is 3 seconds when the length is 36 inches, what is the period when L=5.0625 inches?

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exam Other Question
Simplify. Write the answers with positive exponents only.

(x to the 2nd power)to the -3rd power (x to the -2nd power) Over
(x tot he 2nd power)to the -4th power simplify.

9 sqrt(6) - 9 sqrt(2)