Find a tool or device around your home or school to investigate. Choose one that doesn't have any source of power other than the person using it. It must use one or more of the six simple machines. Identify the tool or device you chose, and explain how it is used. What work does a person do while using it? What kind of motion do we see when it's used Which simple machines are used in the tool or device? i chose axe

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Does the function satisfy the hypotheses of the mean value theorem on the given interval? f(x) = 4x^2 + 3x + 4, [−1, 1] no, f is continuous on [−1, 1] but not differentiable on (−1, 1). no, f is not continuous on [−1, 1]. yes, f is continuous on [−1, 1] and differentiable on (−1, 1) since polynomials are continuous and differentiable on . there is not enough information to verify if this function satisfies the mean value theorem. yes, it does not matter if f is continuous or differentiable; every function satisfies the mean value theorem.