How many liters each of a 20% acid solution and a 60% acid solution must be used to produce 40 liters of a 25% acid solution? (Round to two decimal places if necessary.)

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