I will mark brainliest if correct

Standard deviation of 19,29,21,22,23

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct

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