Answer:
#1 Haley is correct and Lacey is incorrect
#2 Kenji is incorrect.
Explanation:
#1. x^3 (x^2) = x^5 but this same law doesn't apply to addition of numbers with exponents.
#2 The law of exponents doesn't apply to numbers with different bases that are not multiples of each other such as 3 and 4, so Kenji's simplification is not correct.