Which law would you use to simplify the expression open paren x to the 4th power close paren to the 9th power ?

The expression is (x^4^9, which has one power raised to another power. Use the power of a power law: multiply the exponents, so (x^4)^9 = x^(4×9) = x^36. The correct choice is power of a power.

AI-written and checked against the verified answer.