Jillian said /25 is irrational because it is a square root. why is she incorrect?

How do i do this activity, is appreciated

One integer is 8 times another. if the product is 72, then find the integers

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