The water level of a river is 40 feet. The summer is hot and dry, and the water level is receding at a rate of 0.5 foot per day. In how many days will the water level be 35 feet?

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