Which expressions represent rational numbers? Check all that apply. StartRoot 6 EndRoot + StartRoot 9 EndRoot StartRoot 64 EndRoot + StartFraction 6 Over 11 EndFraction StartRoot 36 EndRoot + StartRoot 21 EndRoot StartRoot 16 EndRoot + StartRoot 169 EndRoot 17.ModifyingAbove 43 with bar + StartRoot 49 EndRoot StartRoot 44 EndRoot + StartRoot 25 EndRoot

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?