4)
A developer estimates
the
profit
from
the
sale
of x units
of land is
n(x)
=
450 -52x+41x2
-x'.
Find:
a) The marginal
profit
at x:4.
b) How many
units must
be
sold for maximum profit?
Justiff
your
answer.
c) What is
the maximum profit?
5) A concert
is to
be held. If
x number of
tickets
are
sold,
it
has
been
estrmated
that
the reveuue collected
would be
R(x)=232x-.08x2.
The
cost involved
is
estimated
to be C(x):522+.06x2
a) Find
the
profit
function
in terms
of x, in simplified
form.
b) How many
tickets
would have
to
be sold to
maximize
profit?
Justifi
your
answer.
c)
If this number is
sold, what
is the
profit?
