According to descartes' rule of signs, how many possible negative real roots could the following polynomial function have? f(x)=3x^4-5x^3+5x^2+5x+2 a. three or one b. three c. one d. two or zero

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.