Simplify each radical. Assume all variables represent positive real numbers. ⁸√5⁴

In Exercises 85–116, simplify each exponential expression.20x³/-5x⁴

Simplify each radical. Assume all variables represent positive real numbers. ⁹√5³

Simplify each radical. Assume all variables represent positive real numbers. ⁶√11³

In Exercises 83–90, evaluate each expression without using a calculator. 16^(−6/2)

In Exercises 75–92, rationalize each denominator. Simplify, if possible. 2√6 + √5--------------3√6 - √5

Simplify each radical. Assume all variables represent positive real numbers. ⁶√x¹⁸y²

Simplify each expression. Write answers without negative exponents. Assume all vari-ables represent positive real numbers. See Examples 8 and 9. (3^1/2)(3^3/2)

In Exercises 79–112, use rational exponents to simplify each expression. If rational exponents appear after simplifying, write the answer in radical notation. Assume that all variables represent positive numbers.____⁹√x⁶y³