What is the common difference in the sequence 11,19,27,35

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap

Find the amplitude of a sinusoidal function that models this temperature variation

How many and of which kind of roots does the equation f(x)=x3−x2−x+1