(a)
\The model for concentration of the glucose solution in the bloodstream is
.
The concentration at time
is
.
Consider
.

Apply integration on each side.
\
Let
then
.
Substitute
and
in the above integral.

Substitute
in the above equation.

Apply exponent on each side.
\


Substitute
and
in the above equation.

Substitute
in
.
.
Concentration at any time
is
.
(b)
\Find
.

.
(a) Concentration at any time
is
.
(b)
.