Calculate each value mentally. (20^3/2)/(5^3/2)

Evaluate the radical.

$-\(\sqrt{\frac14}\)$

Evaluate the radical.

$\(\sqrt{\left(-5\right)^2}\)$

Determine whether each statement is true or false. If false, correct the right side of the equation. (y²)(y⁵) = y⁷

Write 27^2/3 in radical form and evaluate.