exam Maths Puzzle Numerical Ability

Multiply and simplify by factoring. Assume that all expressions under radicals represent nonnegative numbers.

root (3, y^4) root (3, 81y^5)

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exam Other Question
Can you let me know if I answered this math problem correctly?
If Sin theta = -2/3 find Sin of (-theta)

I came up with Sin theta = 2/3.

Thank you.

Sarah McGuire a plane flies 285 km due west and then 320 km due north. What are its distance and bearing from the starting point