I need work and help on this problem

Is the figure congruent? yes or no?

Consider this expression and the steps to evaluate it. 4^5(−2)^9/4^8(−2)^3 1. apply the quotient of powers:      (−2)^a/4^b 2. evaluate powers:           c/d select the value of each variable. a = _ b = _ c = _ d = _

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2