%% P 1.13
% Use Matlab to compute the following. Check your answers by hand.
% a.  (3 + 6i)(-7 -9i)

%Code

% b.  \frac{5 + 4i}{5 - 4i}

Code

% c. \frac{3}{2}i



% d. \frac{3}{2i}

Code

%
%% P 1.14
% Evaluate the following expressions in Matlab, for the values x = 5+8i,  y=-6+7i. Check your answers by hand.
% a. u =x+y

%Code

% b. v=xy

%Code

% c. w=x/y

%Code

% d. z=e^x

%Code

% e. r=\sqrt{y}

%Code

% f. s=xy^2

%Code

% P1.10
% The volume of a circular cylinder of height h and radius r is given by V = \pi r^2h.  A particular cylindrical tank is 10 m tall and has a radius of 6 m. We want to construct another cylindrical tank with a volume 30 percent greater but having the same radius. How high must the tank be?