Ayogurt shop allows its customers to add, for no charge, 3 toppings to any yogurt purchased. if the store has 15 possible toppings, how many different 3-topping combinations can a customers choose?

Is the orthocenter of a triangle on the inside ?

Nikolas calculated the volume of the prism. his work is shown below.

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?