The increase is an exponential increase in a multiplier

and as decimal 1.0045
Final Value = Initial Value ×

Final value =

Final value = 393 mg (to the nearest whole number)
Half life = 0.5 years
Final value =

=301 mg
The answer is D just so you know
Answer:
The scale factor is 1/2
Step-by-step explanation:
Given
and 
Required
The scale factor from
to 
Take a corresponding side in both triangles.
We have:

The scale factor from
to
is:



2/5 + 1/2 = 0.9
0.9 in fraction form is 9/10!
Hope this helps!