Simplify the factorial expression...

Measures of the angle of r, 31 s (x+4) t (3x+9)

Find the volume of the described solid. the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x. a) 441b) 147c) 864d) 882

If a is a nonzero real number then the reciprocal of a is