Hello,
Not to be a bother, but I have question about problem solving:

A baseball diamond is a square with side 90ft. A batter hits the ball and runs toward first base with a speed of 24ft/s.
a) At what rate is his distance from second base decreasing when he is halfway to first base?
b) At what rate is his distance from third base increasing at the same moment?

This question is worded strangely so thats what I'm having trouble approaching it, but it has to do with related rates.

Thanks in advance

y= fourth root (x+1/x-1), solve using logarithmic differentiation.
y= (x+1/x-1)(I think that would be the other way to write this problem).

Thanks

hi all,

                            I  have a program written using Matlab, how can I change it into a program written using Maple.

the program:

% THE
% MATLAB

function [xmin, fxmin, iter] = PSO

%%%
success = 0;      

I use the MaxFlow command from the GraphTheory package, but I don't understand the results that I get.
The max flow value is okay, but the matrix in which the flows from node to node are given, is not what I expected.

Is this problem caused by the fact that the graph is not directed? I don't want to use a directed graph, because flows can choose only one of both directions.

H:=Graph(6,{{1,2},{1,3},{2,4},{4,6},{3,5},{5,6},{4,5}},weighted):
DrawGraph(H,style=spring);
MaxFlow(H,1,4);

As a solution I get:

Hej,
i'm quite new to maple and i want your advice /guidance(in fact i'm desperate)

in order to solve a system of 2 pdes coupled with 4 odes.
the pdes are :

diff((r1(t)*C1(t)+r2(t)*C2(t))*T(z,t),t)=diff(k(T(z,t))*diff(T(z,t),z),z)+Q*r1(t)

diff(e(t)*Y(z,t),t)=diff(D(Y(z,t))*diff(Y(z,t),z),z)-(B*exp(T(z,t))*r1(t)

odes:
diff(r1(t),t)=-(A*exp(T(z,t))+B*exp(T(z,t)))*r1(t)

diff(r2(t),t)=A*exp(T(z,t)*r1(t)

diff(r3(t),t)=B*exp(T(z,t)*r1(t)