Answer: 
Step-by-step explanation:
By definition, a Translation is a transformation that moves an object a fixed distance. In Transalation the size, shape and orientation of the object don't change.
The translation of a point
"a" units right and "b" units up is:

In this case we know that the coordinates of A of the Triangle ABC is A(-2, -3) and the Triangle ABC is translated 1 unit right and 3 units up. Therefore, the the coordinates of A' are:


We have this equation:

and we need to find the value of x.
First of all, we multiply the whole equation for 1/2, so our goal is to isolate x, therefore:
Next step we must do is to apply logarithms:

Next, we have to apply identities and then to solve the equation:




Finally, we have the value of x which was our goal. This is the answer for the question above:
The answer is D.
Multiply fraction by the total amount of medicine
=3/4 * 20 mg
multiply numerator by 20
=(3*20)/4
=60/4
=15 mg
ANSWER: He received 15 mg
Hope this helps! :)