Cos(alpha-beta) equals?

What is the value of y? round to the nearest tenth

Find the volume of the solid whose base is the region bounded by f(x), g(x) and the x-axis on the interval [0, 1], and whose cross-sections perpendicular to the y-axis are squares. your work must show the integral, but you may use your calculator to evaluate it. give 3 decimal places for your answe

Simplify. 3(4+4x) (type your answer in with no spaces)