Algebra Exponents and Roots Practice Test Results

Question 1
57% answer correctly
What`s the square root of \\(16x^2\\) ?
\\(4\\sqrt{x}\\)
4x
\\(\\sqrt{4}x\\)
\\(\\sqrt{4x}\\)
Question 2
57% answer correctly
What is the root in \\(\\sqrt[3]{64}\\) ?
4
64
3
\\(\\sqrt{ }\\)
Question 3
54% answer correctly
Which of the following is equivalent to \\(x^{-9}\\)?
\\(-x^9\\)
\\(\\frac{x}{-9}\\)
\\(\\frac{x}{9}\\)
\\(\\frac{1}{x^{9}}\\)