Denise wants to find out how the steepness of a hill’s slope affects the amount of soil that erodes from it. she will use soil, a long pan, and several 4-inch-tall wooden blocks to build a model hillside. she will use a watering can to simulate rainfall. in her experiment, which factor should be denise’s variable?
the type of soil with which she fills the pan
the number of blocks holding up the end of the pan
the amount of water she pours on the model hillside
the location she uses to test her model

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?

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?

Asix-sided number cube is rolled twice. what is the probability that the first roll is an even numbe and the second roll is a number greater than 4?