Please help

[neopolitano321]

A drug is administered intravenously for pain. The function f(t)=90-52ln(1+t), 0?t?4 gives the number of units of the drug in the body after t hours.
(a) What was the initial number of units of the drug administered?
(b) How much is present after 2 hours?
(c) Draw the graph of F

 

[BigGlenntheHeavy]

$\displaystyle f(t) \ = \ 90-52ln(1+t)$

$\displaystyle a) \ f(0) \ = \ 90-53ln(1+0) \ = \ 90.$

$\displaystyle b) \ f(2) \ = \ 90-52ln(3) \ \dot= \ 35$

$\displaystyle c) \ See \ graph$

[attachment=0:2eq3buov]ccc.jpg[/attachment:2eq3buov]