6. Give a mathematical example to show the following: For any rational number m/n and any positive real number a, a^-m/n means 1/a^m/n 7. Give a numerical example to represent this rule. For any nonnegative number a, any integer k and m then: ^k sqrt a^m = (^k sqrt a)^m

8. Write with rational exponents. Be sure to show your work and simplify your answer. (^6 sqrt 12ab)^3

9. Write without using rational exponents. (m^3 n^5)^1/4

PLS HELP

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?