How much did she spend in week 4 than in week 1? $ pls show work.

Rewrite so the subject can be y in the formula d=m-y/y+n

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

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?