My dad has 9 oak and maple boards from the lumber yard. Each oak board is 10 centimeters thick. Each maple board is 2 centimeters thick. When my dad stacks the boards, the stack is 50 centimeters thick. How many of each type of board does he have? oak boards maple boards

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?