solve the problem

Question

The function D(h) = 5e^-0.4h can be used to
determine the milligrams D of a certain drug in
a patient's bloodstream h hours after the drug
has been given. How many milligrams (to two
decimals) will be present after 7 hours?

Answer 1

All you need to do is put; h=7 into the equation and solve for D(h).