Maggie spent $46.20 to by pencil sharpeners for her gift shop. if each pencil sharpener cost 60 cents how many pencil sharpeners did she buy

Ill mark the brainliest if you me with the these three questions 7,8,9

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.

What is r i 4.5+10r=-6.5 with work pls